artist,genre,country
S VREMENA NA VREME,Prog Folk,Yugoslavia
S&L,Heavy Prog,Italy
S.O.T.E. (SONGS OF THE EXILE),Heavy Prog,Netherlands
S91,Progressive Metal,Italy
SAAGARA,Indo-Prog/Raga Rock,India
SAAL HARDALI,RIO/Avant-Prog,Israel
ILP AASTAMOINEN,Prog Folk,Finland
SAB,Progressive Electronic,Japan
SACCHARINE TRUST,Eclectic Prog,United States
SACKA,Rock Progressivo Italiano,Italy
SACRIFICE TO SURVIVE,Progressive Metal,United States
SACRUM,Progressive Metal,Argentina
SAD MINSTREL,Prog Folk,Italy
SADDAR BAZAAR,Indo-Prog/Raga Rock,United Kingdom
SADDLEBACK,Post Rock/Math rock,Australia
SADGAYERS,Post Rock/Math rock,United States
SADIST,Tech/Extreme Prog Metal,Italy
SADISTIC MIKA BAND,Prog Related,Japan
JASO ADITES,Jazz Rock/Fusion,Canada
SADJA,Indo-Prog/Raga Rock,Germany
MICHAE ADLER,Crossover Prog,Canada
SADMAN INSTITUTE,Progressive Metal,Poland
SADO,Crossover Prog,Uzbekistan
KRZYSZTO ADOWSKI AND HIS GROUP,Jazz Rock/Fusion,Poland
SAECULA SAECULORUM,Symphonic Prog,Brazil
SALIM GHAZ AEEDI,Crossover Prog,Iran
SAELIG OYA,Heavy Prog,France
SAENA,Symphonic Prog,Mexico
SAENS,Neo-Prog,France
TH AFETY FIRE,Progressive Metal,United Kingdom
SAFFRAN,Crossover Prog,Germany
SAFIYYA,Progressive Electronic,United States
SAFT,Crossover Prog,Norway
SAGA,Psychedelic/Space Rock,Sweden
SAGA,Crossover Prog,Portugal
SAGA,Crossover Prog,Canada
SAGA,Symphonic Prog,Netherlands
SAGA DE RAGNAR LODBROCK,Prog Folk,France
SAGITTARIAN,Neo-Prog,Japan
SAGRADO CORAÇĂO DA TERRA,Symphonic Prog,Brazil
SAGRAM,Indo-Prog/Raga Rock,United Kingdom
SAHARA,Eclectic Prog,Germany
CHARL AHONA,Progressive Metal,France
SAIGA ANTELOPE,Crossover Prog,Norway
TH AILING,Crossover Prog,United States
SAILOR FREE,Heavy Prog,Italy
SAĎNO,Jazz Rock/Fusion,France
SAINT JUST,Prog Folk,Italy
SAIREN,Post Rock/Math rock,France
SAJJANU,RIO/Avant-Prog,Japan
SAKRE,Prog Folk,Spain
MOTO AKURABA,Neo-Prog,Japan
SAL Y MILETO,Experimental/Post Metal,Ecuador
SALAIVA,Jazz Rock/Fusion,Finland
SALAMANDER,Proto-Prog,United Kingdom
SALANDER,Crossover Prog,United Kingdom
SALARYMAN,Post Rock/Math rock,United States
SALEM HILL,Neo-Prog,United States
SALES DE BAŃO,RIO/Avant-Prog,Argentina
ALICI,Crossover Prog,Italy
SALIS,Rock Progressivo Italiano,Italy
SALLE GAVEAU,RIO/Avant-Prog,Japan
TH ALLYANGIE,Prog Folk,United Kingdom
SALMA GANDHI,Psychedelic/Space Rock,Sweden
SALMAGÜNDI,RIO/Avant-Prog,Italy
SALMO,RIO/Avant-Prog,France
SALMON,Symphonic Prog,Netherlands
SALUKI,Jazz Rock/Fusion,Norway
SALVA,Crossover Prog,Sweden
SALVATORE,Post Rock/Math rock,Norway
SALVICTION,Experimental/Post Metal,Poland
SAM (SLICK ALEXIUS MENNIGMANN),Jazz Rock/Fusion,Germany
SAMADHI,Rock Progressivo Italiano,Italy
SAMANOVO ZBOZI,Crossover Prog,Czech Republic
SAMETI,Krautrock,Germany
SAMLA MAMMAS MANNA,RIO/Avant-Prog,Sweden
SAMMAL,Psychedelic/Space Rock,Finland
SAMMATH NAUR,Tech/Extreme Prog Metal,Poland
SAMMELSURIUM,Crossover Prog,Germany
SAMSARA,Rock Progressivo Italiano,Italy
SAMSARA BLUES EXPERIMENT,Psychedelic/Space Rock,Germany
TH AMUEL JACKSON FIVE,Post Rock/Math rock,Norway
SAMURAI,Crossover Prog,United Kingdom
TH AMURAI OF PROG,Crossover Prog,Multi-National
RODRIG AN MARTIN,Crossover Prog,Argentina
SAN PEDRO'S VISION,Psychedelic/Space Rock,United Kingdom
DAVI ANCIOUS,Jazz Rock/Fusion,United States
SAND,Krautrock,Germany
SAND SNOWMAN,Crossover Prog,United Kingdom
SANDCASTLE,Heavy Prog,Italy
DOMINI ANDERSON,Eclectic Prog,United Kingdom
SANDROSE,Symphonic Prog,France
SANDSTONE,Progressive Metal,Poland
SANGIULIANO,Progressive Electronic,Italy
SANGRE DE MUERDAGO,Prog Folk,Spain
SANGUINE HUM,Neo-Prog,United Kingdom
SANHEDRIN,Eclectic Prog,Israel
SANITY,Progressive Metal,Netherlands
SANKT OTTEN,Progressive Electronic,Germany
SANNHET,Experimental/Post Metal,United States
SANTA SABINA,Crossover Prog,Mexico
SANTANA,Jazz Rock/Fusion,Multi-National
CARLO ANTANA,Jazz Rock/Fusion,Mexico
GUSTAV ANTHIAGO,Symphonic Prog,Brazil
ANTONI,Crossover Prog,Italy
SANVOISEN,Progressive Metal,Germany
SAPAT,Psychedelic/Space Rock,United States
SAQQARAH,Neo-Prog,France
SARASTRO BLAKE,Crossover Prog,Italy
SARAX,Post Rock/Math rock,Chile
SARCASME,Heavy Prog,France
SARCOPHAGUS NOW,Eclectic Prog,Sweden
SARIS,Neo-Prog,Germany
SARLO AKROBATA,RIO/Avant-Prog,Yugoslavia
SARMAT,Tech/Extreme Prog Metal,United States
SARTORIUS,Heavy Prog,Mexico
YOSS ASSI,Crossover Prog,Israel
SATAN,Symphonic Prog,France
SATAN ALFA BEEL ATEM,Progressive Electronic,Japan
SATANIQUE SAMBA TRIO,RIO/Avant-Prog,Brazil
SATCHITANANDA,Jazz Rock/Fusion,United States
TH ATELITE,Post Rock/Math rock,Peru
SATELLITE,Neo-Prog,Poland
SATIN WHALE,Prog Related,Germany
SATISFACTION INJECTION,Jazz Rock/Fusion,Netherlands
MASAHIK ATOH AND THE SOUNDBREAKERS,RIO/Avant-Prog,Japan
SATURNALIA,Psychedelic/Space Rock,United Kingdom
SATURNIA,Indo-Prog/Raga Rock,Portugal
SATWA,Indo-Prog/Raga Rock,Brazil
SAULES LAIKRODIS,Crossover Prog,Lithuania
SAUNABADH,Psychedelic/Space Rock,Finland
SAVAGE LUCY,Post Rock/Math rock,South Africa
TH AVAGE ROSE,Prog Related,Denmark
SAVANNA,Psychedelic/Space Rock,Portugal
SAVATAGE,Progressive Metal,United States
SAVING THROW,Post Rock/Math rock,United States
SAVIOUR MACHINE,Progressive Metal,United States
DIONYSI AVVOPOULOS,RIO/Avant-Prog,Greece
SAWHORSE,Post Rock/Math rock,United States
SAWKEN,Psychedelic/Space Rock,Chile
SAXON SHORE,Post Rock/Math rock,United States
SAYER,Progressive Electronic,United States
SBB,Eclectic Prog,Poland
SC'ÖÖF,Zeuhl,Switzerland
SCALE THE SUMMIT,Progressive Metal,United States
JAIM CALPELLO,Crossover Prog,Chile
SCAPA FLOW,Prog Folk,Finland
SCAPELAND WISH,Neo-Prog,United States
SCAPHOID,Experimental/Post Metal,United States
TH CARAMANGA SIX,Crossover Prog,United Kingdom
SCARAMOUCHE,Symphonic Prog,Germany
SCARCITY,Experimental/Post Metal,United States
SCARDUST,Progressive Metal,Israel
SCARECREW,Krautrock,Germany
SCARED BUNNY,Psychedelic/Space Rock,Canada
SCARIOT,Progressive Metal,Norway
SCARLET HOLLOW,Heavy Prog,United States
SCARLET INSIDE,Crossover Prog,United Kingdom
SCARLET STORIES,Progressive Metal,Netherlands
SCARLET THREAD,Prog Folk,Finland
SCARLET UTOPIA,Psychedelic/Space Rock,Germany
SCATTERED PURGATORY,Krautrock,Taiwan
SCENARIO,Progressive Metal,Italy
SCENERY,Tech/Extreme Prog Metal,Czech Republic
SCENERY CHANNEL,Progressive Metal,Finland
JANN CHAFFER,Jazz Rock/Fusion,Sweden
SCHAMMASCH,Tech/Extreme Prog Metal,Switzerland
SCHEHERAZADE,Neo-Prog,Japan
JA CHELHAAS,Crossover Prog,United Kingdom
DANIE CHELL & KARO,RIO/Avant-Prog,Belgium
LUC CHERANI,Eclectic Prog,Italy
TO CHERPENZEEL,Crossover Prog,Netherlands
SCHERZOO,Zeuhl,France
SCHICKE & FÜHRS & FRÖHLING,Symphonic Prog,Germany
GÜNTE CHICKERT,Progressive Electronic,Germany
DO CHIFF,Jazz Rock/Fusion,United States
TITO JR CHIPA,Rock Progressivo Italiano,Italy
SCHIZOFRANTIK,Eclectic Prog,Germany
SCHIZOID LLOYD,Experimental/Post Metal,Netherlands
SCHIZOPHONIA,Crossover Prog,Switzerland
SCHLACHTVIEH,Krautrock,Germany
SCHLEIGHO,Jazz Rock/Fusion,United States
ART SPIK CHLOEMER,Jazz Rock/Fusion,United States
SCHLOSS TEGAL,Progressive Electronic,United States
IRMI CHMIDT,Prog Related,Germany
SCHNAUSER,Crossover Prog,United Kingdom
SCHNELLERTOLLERMEIER,RIO/Avant-Prog,Switzerland
CONRA CHNITZLER,Progressive Electronic,Germany
EBERHAR CHOENER,Progressive Electronic,Germany
SCHOENHERZ,Crossover Prog,Austria
SCHOLOMANCE,Tech/Extreme Prog Metal,United States
SCHÖNFELD,Jazz Rock/Fusion,United Kingdom
SCHOOL OF THE ARTS,Jazz Rock/Fusion,United States
SCHOOLTREE,Crossover Prog,United States
ROBER CHROEDER,Progressive Electronic,Germany
SCHROEDINGER'S CAT,Psychedelic/Space Rock,Germany
SCHTUNG,Crossover Prog,New Zealand
KLAU CHULZE,Progressive Electronic,Germany
SCHWARZ,Psychedelic/Space Rock,Spain
NERISS CHWARZ,Crossover Prog,Germany
SCHWARZARBEIT,Crossover Prog,Germany
SCHYSMA,Progressive Metal,Italy
TH CIENCE GROUP,RIO/Avant-Prog,Multi-National
SCIENCE IN THE CAVE,Post Rock/Math rock,United States
SCIENCE NV,Crossover Prog,United States
SCIENTIST,Experimental/Post Metal,United States
KRZYSZTO CIERANSKI,Jazz Rock/Fusion,Poland
SCISSOR SHOCK,RIO/Avant-Prog,United States
SCLERA,Tech/Extreme Prog Metal,Australia
NAT COBLE,Prog Folk,United States
JOH COFIELD,Jazz Rock/Fusion,United States
SCOPE,Jazz Rock/Fusion,Netherlands
SCORCH TRIO,RIO/Avant-Prog,Multi-National
SCORCHED SHORE,Experimental/Post Metal,United States
SCRAPS OF TAPE,Post Rock/Math rock,Sweden
SCREAMING EARTH,Crossover Prog,Poland
SCREAMING GYPSY BANDITS,Eclectic Prog,United States
SCREAMING HEADLESS TORSOS,Jazz Rock/Fusion,United States
SCROOGE,RIO/Avant-Prog,Austria
SCULPTOR,Tech/Extreme Prog Metal,Serbia
SCULPTURED,Tech/Extreme Prog Metal,United States
SCYTHE,Eclectic Prog,Germany
SDNMT,Post Rock/Math rock,Germany
SE DELAN,Crossover Prog,United Kingdom
SEA IN THE SKY,Progressive Metal,United States
TH EA LIKE LEAD,Post Rock/Math rock,United States
TH EA NYMPHS,Crossover Prog,United Kingdom
SEA OF NECTAR,Progressive Metal,Venezuela
SEA OF SKIES,Progressive Metal,United States
SEA VINE,Neo-Prog,Poland
TH EA WITHIN,Eclectic Prog,Multi-National
SEABROOK POWER PLANT,RIO/Avant-Prog,United States
SEALAND AIRLINES,Psychedelic/Space Rock,Ukraine
SEAMUS,Eclectic Prog,France
TH EASON STANDARD,Eclectic Prog,Germany
SEASONS OF TIME,Neo-Prog,Germany
SEAWORTHY,Post Rock/Math rock,Australia
SEBASTIAN HARDIE,Symphonic Prog,Australia
SEBKHA CHOTT,RIO/Avant-Prog,France
SECOND FAMILY BAND,Krautrock,United States
SECOND HAND,Psychedelic/Space Rock,United Kingdom
SECOND MOVEMENT,Symphonic Prog,Germany
L ECONDA GENESI,Rock Progressivo Italiano,Italy
SECONDS BEFORE LANDING,Crossover Prog,United States
SECONDSKIN,Experimental/Post Metal,United Kingdom
SECOS & MOLHADOS,Prog Folk,Brazil
SECRET CHIEFS 3,RIO/Avant-Prog,United States
SECRET CINEMA,Neo-Prog,Italy
SECRET GREEN,Prog Folk,United Kingdom
TH ECRET MACHINES,Psychedelic/Space Rock,United States
SECRET OYSTER,Jazz Rock/Fusion,Denmark
ECRET RIVER,Crossover Prog,Sweden
SECRET SAUCER,Psychedelic/Space Rock,United States
SECRET SOCIETY OF STARFISH,Progressive Metal,United States
SECRET TALES,Rock Progressivo Italiano,Italy
SECTILE,Progressive Metal,Ireland
SECTION 3B,Heavy Prog,Multi-National
SECTION A,Progressive Metal,Multi-National
SECTION IV,Crossover Prog,United Kingdom
SEDATE ILLUSION,Progressive Metal,Greece
SEDMINA,Prog Folk,Yugoslavia
SEED,Crossover Prog,Spain
SEEDOG,Krautrock,Germany
SEER'S TEAR,Progressive Metal,United Kingdom
SEESSELBERG,Progressive Electronic,Germany
YOCHK' EFFER,Zeuhl,France
I EGNO DEL COMANDO,Rock Progressivo Italiano,Italy
TH EGUE,Jazz Rock/Fusion,Poland
SEHNSUCHT,Psychedelic/Space Rock,Russia
SEI STILL,Krautrock,Mexico
SEID,Psychedelic/Space Rock,Norway
SEIKAZOKU,Krautrock,Japan
SEKKUTSU JEAN,Zeuhl,Japan
SELCOUTH,Experimental/Post Metal,Finland
SELDON,Rock Progressivo Italiano,Italy
SELECTRIC,Jazz Rock/Fusion,United Kingdom
SELVANS,Experimental/Post Metal,Italy
SEMANTIC SATURATION,Progressive Metal,Canada
SEMENTE,Psychedelic/Space Rock,Brazil
SEMI,Psychedelic/Space Rock,Japan
SEMIOSIS,Post Rock/Math rock,Romania
SEMIRAMIS,Rock Progressivo Italiano,Italy
SEMOOL,Krautrock,France
TON ENATORE,Jazz Rock/Fusion,United States
SENDELICA,Psychedelic/Space Rock,United Kingdom
SENECA,Heavy Prog,United States
KE ENIOR,Neo-Prog,United Kingdom
SENMUTH,Experimental/Post Metal,Russia
SENNEN,Post Rock/Math rock,Netherlands
SENOGUL,Eclectic Prog,Spain
SENSATIONS' FIX,Psychedelic/Space Rock,Italy
L ENSAZIONI,Rock Progressivo Italiano,Italy
SENSE,Crossover Prog,Canada
ENSE OF GRAVITY,Progressive Metal,United States
SENSES,Crossover Prog,United States
SENSITIVA IMMAGINE,Rock Progressivo Italiano,Italy
SENSITIVE TO LIGHT,Symphonic Prog,France
SENSUAL NOISE,Experimental/Post Metal,Belgium
SENTIENT,Psychedelic/Space Rock,United Kingdom
I ENTIERO DI TAUS,Rock Progressivo Italiano,Italy
SENTRYTURN,Progressive Metal,Germany
SENZA NOME,Rock Progressivo Italiano,Italy
SEPIA DREAMER,Experimental/Post Metal,Sweden
SEPSIS,Psychedelic/Space Rock,Russia
SEPTEMBER,Jazz Rock/Fusion,Yugoslavia
SEPTEMBER MALEVOLENCE,Post Rock/Math rock,Sweden
SEPUTUS,Tech/Extreme Prog Metal,United States
SEQUENCE PULSE,Post Rock/Math rock,Japan
SEQUENTIA LEGENDA,Progressive Electronic,France
SERDCE,Tech/Extreme Prog Metal,Belarus
SERENE,Symphonic Prog,Germany
SERGE RAMSES,Progressive Electronic,France
SERIOUS BEAK,Tech/Extreme Prog Metal,Australia
SERIS,Progressive Metal,United States
SERMON,Progressive Metal,United Kingdom
SERPENT COLUMN,Tech/Extreme Prog Metal,United States
SERPENTINA SATELITE,Psychedelic/Space Rock,Peru
SERPENTYNE,Prog Folk,United Kingdom
SERÚ GIRÁN,Prog Related,Argentina
SERVANTS OF SCIENCE,Crossover Prog,United Kingdom
GILLE ERVAT,Prog Folk,France
SESSION,Crossover Prog,Finland
SESSION VII,Progressive Metal,Canada
SET FIRE TO FLAMES,Post Rock/Math rock,Canada
SETENTIA,Tech/Extreme Prog Metal,New Zealand
SETH ANGERER,Progressive Metal,Austria
SETI,Neo-Prog,Chile
SETNA,Zeuhl,France
SEVEN,Experimental/Post Metal,United States
SEVEN DAY HUNT,Neo-Prog,Netherlands
SEVEN HORIZONS,Heavy Prog,Italy
SEVEN IMPALE,Eclectic Prog,Norway
SEVEN NAUTICAL MILES,Experimental/Post Metal,Sweden
SEVEN NINES AND TENS,Experimental/Post Metal,Canada
SEVEN PERCENT SOLUTION,Psychedelic/Space Rock,United States
SEVEN REIZH,Symphonic Prog,France
SEVEN SIDE DIAMOND,Crossover Prog,Brazil
SEVEN STEPS TO THE GREEN DOOR,Neo-Prog,Germany
SEVEN TEARS,Progressive Metal,Sweden
SEVEN THAT SPELLS,Psychedelic/Space Rock,Croatia
SEVENTH DIMENSION,Progressive Metal,Sweden
SEVENTH SONS,Indo-Prog/Raga Rock,United States
SEVENTH STATION,Progressive Metal,Slovenia
SEVENTH WAVE,Crossover Prog,United Kingdom
SEVENTH WILL,Crossover Prog,Italy
SEVENTH WONDER,Progressive Metal,Sweden
SEVERED GARDEN,Neo-Prog,Italy
SEZIONE FRENANTE,Rock Progressivo Italiano,Italy
SF,Psychedelic/Space Rock,Japan
SFARATTHONS,Rock Progressivo Italiano,Italy
SFILTROM,Eclectic Prog,Slovenia
SFINX,Eclectic Prog,Romania
MARC FOGLI,Progressive Metal,Italy
SFUMATO,Psychedelic/Space Rock,Germany
SGT.,Post Rock/Math rock,Japan
SH'MANTRA,Psychedelic/Space Rock,Australia
SHAA KHAN,Heavy Prog,Germany
SHADES OF DAWN,Symphonic Prog,Germany
SHADOW CIRCUS,Symphonic Prog,United States
SHADOW GALLERY,Progressive Metal,United States
SHADOW MERCHANT,Heavy Prog,United States
TH HADOW THEORY,Progressive Metal,Multi-National
SHADOWFAX,Crossover Prog,United States
P.J HADOWHAWK,Neo-Prog,United States
SHADOWLAND,Neo-Prog,United Kingdom
SHADOWLIGHT,Crossover Prog,United Kingdom
SHADOWS LAND,Tech/Extreme Prog Metal,Poland
SHADRANE,Progressive Metal,France
SHADYON,Progressive Metal,France
SHAKARY,Neo-Prog,Switzerland
SHAKTI WITH JOHN MCLAUGHLIN,Indo-Prog/Raga Rock,Multi-National
SHALABI EFFECT,Post Rock/Math rock,Canada
SHALASH BAND,Symphonic Prog,Russia
SHAMALL,Neo-Prog,Germany
SHAMAN,Progressive Metal,Brazil
SHAMAN ELEPHANT,Psychedelic/Space Rock,Norway
SHAMBLEMATHS,Eclectic Prog,Norway
SHAMPOO,Jazz Rock/Fusion,Belgium
ANAND HANKAR,Indo-Prog/Raga Rock,India
SHANNON,Prog Folk,France
SHANNONDOA,Krautrock,Germany
SHANTI,Indo-Prog/Raga Rock,Multi-National
SHAOLIN DEATH SQUAD,Progressive Metal,United States
SHAPES STARS MAKE,Post Rock/Math rock,United States
KAMILL HARAPODINOV,Crossover Prog,Russia
SHARDBORNE,Progressive Metal,Ireland
SHARKMOVE,Symphonic Prog,Indonesia
ROHA HARMA,Progressive Metal,Australia
SHATTER PROJECKT,Psychedelic/Space Rock,United States
SHATTERED GLASS,Progressive Metal,Brazil
SHATTERED LIGHT,Progressive Metal,Russia
SHATTERED SKIES,Progressive Metal,United Kingdom
SHATTERED SYSTEMS,Progressive Metal,United States
SHAVE THE MONKEY,Prog Folk,United Kingdom
MAR HEEKY,Progressive Electronic,United Kingdom
SHEER CEREBRAL POWER,Eclectic Prog,Various
SHELL FROM OCEANIC,Progressive Metal,Portugal
WILLIA HELLER,Prog Related,France
HELTER IN THE DESERT,Post Rock/Math rock,Mexico
SHELTER RED,Experimental/Post Metal,United States
SHELVING,Experimental/Post Metal,Switzerland
SHEM,Psychedelic/Space Rock,Germany
SHEPHERDS OF CASSINI,Experimental/Post Metal,New Zealand
DERE HERINIAN,Jazz Rock/Fusion,United States
SHERPA THE TIGER,Krautrock,Ukraine
BILL HERWOOD,Crossover Prog,United States
SHESHET,Eclectic Prog,Israel
SHIBUSASHIRAZU,Jazz Rock/Fusion,Japan
SHIDE & ACORN,Prog Folk,United Kingdom
KENT HIMAKAWA,Zeuhl,United States
TH HIN,Jazz Rock/Fusion,Georgia
SHINE DIÓN,Prog Folk,Norway
SHINEBACK,Crossover Prog,United Kingdom
SHINGETSU,Symphonic Prog,Japan
SHINING,RIO/Avant-Prog,Norway
SHINING,Tech/Extreme Prog Metal,Sweden
SHINKI CHEN & FRIENDS,Psychedelic/Space Rock,Japan
SHINSEKAI,Eclectic Prog,Japan
SHIP OF FOOLS,Psychedelic/Space Rock,United Kingdom
SHIVA THE DESTRUCTOR,Psychedelic/Space Rock,Ukraine
SHIVANANDA,Jazz Rock/Fusion,Switzerland
TH HIVER,Proto-Prog,Switzerland
SHOB,Jazz Rock/Fusion,France
SHOGUN KUNITOKI,Progressive Electronic,Finland
SHORA,Post Rock/Math rock,Switzerland
SHORT WAVE,Canterbury Scene,United Kingdom
WAYN HORTER,Jazz Rock/Fusion,United States
SHOW-YEN,Heavy Prog,Japan
SHOWMEN 2,Rock Progressivo Italiano,Italy
MAR HREEVE,Progressive Electronic,United Kingdom
SHRINEBUILDER,Experimental/Post Metal,United States
SHUB-NIGGURATH,Zeuhl,France
FREDERIC HULLER,Progressive Electronic,Romania
DAMO HULMAN,Eclectic Prog,United Kingdom
SHUMAUN,Progressive Metal,Multi-National
SHURAKAY,Crossover Prog,Spain
SHUTTAH,Psychedelic/Space Rock,United Kingdom
TH HY TRAFFICKER,Post Rock/Math rock,United States
SHYLOCK,Symphonic Prog,France
PAOL IANI FT. NUOVA IDEA,Rock Progressivo Italiano,Italy
SIBELIUS,Progressive Metal,Venezuela
SICHER,Symphonic Prog,Switzerland
SICKOAKES,Post Rock/Math rock,Sweden
SICMONIC,Tech/Extreme Prog Metal,United States
SIDDHARTHA,Psychedelic/Space Rock,Turkey
SIDDHARTHA,Krautrock,Germany
SIDE C,Rock Progressivo Italiano,Italy
SIDE STEPS,Crossover Prog,Japan
SIEGES EVEN,Progressive Metal,Germany
SIENA ROOT,Heavy Prog,Sweden
SIGH,Experimental/Post Metal,Japan
SIGMA,Neo-Prog,Brazil
SIGMA 5,Progressive Metal,Brazil
SIGMA CERO,Progressive Metal,Spain
SIGNAL TO NOISE RATIO,Psychedelic/Space Rock,Poland
SIGNALS OF BEDLAM,Heavy Prog,United States
SIGNS OF ONE,Prog Related,Canada
SIGUR RÓS,Post Rock/Math rock,Iceland
SIIILK,Crossover Prog,France
SIINAI,Krautrock,Finland
SIJ,Progressive Electronic,Ukraine
SIKA REDEM,Experimental/Post Metal,United Kingdom
SIKTH,Tech/Extreme Prog Metal,United Kingdom
SIL MUIR,Progressive Electronic,Italy
SILAS NEPTUNE,Psychedelic/Space Rock,United States
SILBERBART,Krautrock,Germany
SILENCE KIT,Post Rock/Math rock,Russia
SILENCE THE ARIA,Tech/Extreme Prog Metal,United States
TH ILENCE,Eclectic Prog,Japan
SILENCIO,RIO/Avant-Prog,United States
SILENT AGREEMENT,Neo-Prog,Netherlands
SILENT CALL,Progressive Metal,Sweden
SILENT CARNIVAL,Krautrock,Italy
SILENT CLASH,Progressive Metal,Canada
SILENT EDGE,Progressive Metal,Netherlands
SILENT EXILE,Progressive Metal,Canada
SILENT GRACE,Eclectic Prog,Ukraine
SILENT ISLAND,Post Rock/Math rock,Hungary
SILENT LAPSE,Progressive Metal,United States
SILENT LUCIDITY,Progressive Metal,Germany
SILENT MEMORIAL,Progressive Metal,Switzerland
SILENT SCREAM,Progressive Metal,Argentina
SILENT TEMPLE,Crossover Prog,United States
SILENT VOICES,Progressive Metal,Finland
SILENTCLOCK,Crossover Prog,France
SILHOUETTE,Neo-Prog,Netherlands
SILJAN,Heavy Prog,France
SILMARIL,Prog Folk,United States
L ILO,RIO/Avant-Prog,Japan
SILOAH,Krautrock,Germany
SILUETLESS,Progressive Metal,Lithuania
SILVER APPLES,Proto-Prog,United States
SILVER HUNTER,Crossover Prog,United Kingdom
SILVER KEY,Neo-Prog,Italy
SILVER LINING,Symphonic Prog,France
ILVER MT. ZION,Post Rock/Math rock,Canada
SILVER SUMMIT,Prog Folk,United States
TH ILVER SURFER,Progressive Electronic,Spain
TH ILVERMAN,Progressive Electronic,United Kingdom
SILVESTER ANFANG,Krautrock,Belgium
FABIOL IMAC,Eclectic Prog,Mexico
SIMAKDIALOG,Jazz Rock/Fusion,Indonesia
SIMEON SOUL CHARGER,Crossover Prog,United States
SIMILAR,Psychedelic/Space Rock,Puerto Rico
ADRIANN IMIONI,Crossover Prog,Brazil
MICKE IMMONDS,Symphonic Prog,United Kingdom
SIMON APPLE,Crossover Prog,United States
SIMON SAYS,Symphonic Prog,Sweden
SIMPLEXITY,Crossover Prog,Egypt
SIMPLY THEY,Neo-Prog,Canada
SIMULACRUM,Progressive Metal,Finland
SINATLIS TSELITSADI (THE LIGHT YEAR),Eclectic Prog,Georgia
DAV INCLAIR,Prog Related,United Kingdom
RICHAR INCLAIR,Canterbury Scene,United Kingdom
SINDELFINGEN,Prog Folk,United Kingdom
SINESTESIA,Progressive Metal,Italy
SINEW,Crossover Prog,Germany
PETE INFIELD,Prog Related,United Kingdom
SINGLE CELLED ORGANISM,Crossover Prog,Germany
SINGLELITO,Eclectic Prog,Colombia
SINGULARITY,Crossover Prog,United States
SINIAALTO,Progressive Electronic,Finland
SINISTER STREET,Neo-Prog,Netherlands
SINISTRO,Experimental/Post Metal,Portugal
SINKADUS,Symphonic Prog,Sweden
SINOIA CAVES,Progressive Electronic,Canada
SINTESI DEL VIAGGIO DI ES,Rock Progressivo Italiano,Italy
SINTESIS,Jazz Rock/Fusion,Argentina
SINTESIS,Prog Folk,Cuba
SINTO,Krautrock,Germany
SINTONIA DISTORTA,Rock Progressivo Italiano,Italy
SINUS,Neo-Prog,Poland
SIOS,Progressive Metal,United States
SIOUM,Post Rock/Math rock,United States
SIQUIERO,Crossover Prog,Argentina
SIR MILLARD MULCH,RIO/Avant-Prog,United States
SIRI KARLSSON,Krautrock,Sweden
SIRIUS,Symphonic Prog,Germany
SISARE,Experimental/Post Metal,Finland
SISTA MAJ,Psychedelic/Space Rock,Sweden
I ISTEMA,Rock Progressivo Italiano,Italy
SISTER HELEN,Crossover Prog,United States
SISTERHOOD OF KLANGPEDAL,Jazz Rock/Fusion,Slovakia
SISTRA,Psychedelic/Space Rock,Italy
SITHONIA,Rock Progressivo Italiano,Italy
SITTING BULL,Krautrock,Germany
SIX CYLINDRES EN V,RIO/Avant-Prog,France
SIX ELEMENTS,Neo-Prog,United States
SIX MAGICS,Progressive Metal,Chile
SIX NORTH,Jazz Rock/Fusion,Japan
SIX ORGANS OF ADMITTANCE,Psychedelic/Space Rock,United States
TH IX PARTS SEVEN,Post Rock/Math rock,United States
SIXTY-NINE,Symphonic Prog,Germany
SIXUN,Jazz Rock/Fusion,France
RIKAR JÖBLOM,Eclectic Prog,Sweden
SJODOGG,Tech/Extreme Prog Metal,Norway
SJS,Neo-Prog,Australia
SKAGOS,Experimental/Post Metal,Canada
SKALDIC CURSE,Tech/Extreme Prog Metal,United Kingdom
SKALDOWIE,Eclectic Prog,Poland
DE KANDALŘSE ORKESTER,Jazz Rock/Fusion,Norway
SKÁPHE,Tech/Extreme Prog Metal,Multi-National
SKE,Eclectic Prog,Italy
SKEEM,Neo-Prog,France
SKELETON CREW,RIO/Avant-Prog,United States
SKELETONBREATH,Heavy Prog,United States
SKEPPET,Krautrock,Sweden
SKEWED SKIES,Experimental/Post Metal,Germany
SKIN ALLEY,Jazz Rock/Fusion,United Kingdom
SKIZMA,Tech/Extreme Prog Metal,Finland
SKORE,Heavy Prog,Hungary
JAKO KŘTT,Progressive Electronic,Denmark
SKRYPTOR,Experimental/Post Metal,United States
SKRYVANIA,Symphonic Prog,France
JÓZE KRZEK,Eclectic Prog,Poland
SKY,Eclectic Prog,United Kingdom
SKY ARCHITECT,Heavy Prog,Netherlands
SKY ARCHITECTS,Post Rock/Math rock,Denmark
SKY CRIES MARY,Crossover Prog,United States
SKY EMPIRE,Progressive Metal,United Kingdom
SKY PICNIC,Psychedelic/Space Rock,United States
SKY SIGNALS,Progressive Metal,Australia
SKYFOX 8,Neo-Prog,Brazil
SKYHARBOR,Progressive Metal,Multi-National
SKYLAKE,Crossover Prog,Netherlands
SKYRAMPS,Progressive Electronic,United States
TH KYS,Crossover Prog,Lithuania
SKYSAW,Crossover Prog,United States
SKYTHALA,Tech/Extreme Prog Metal,United States
SKYWHALE,Jazz Rock/Fusion,United Kingdom
SL THEORY,Heavy Prog,Greece
SLAMMIN'THRU,Progressive Metal,Spain
SLAPP HAPPY,RIO/Avant-Prog,Multi-National
TO LATTER,Crossover Prog,United Kingdom
SLAVES TO FASHION / EX P:O:B (PEDESTRIANS OF BLUE),Progressive Metal,Norway
TH LEEP DESIGN,Post Rock/Math rock,United States
SLEEP IN HEADS,Progressive Metal,Ukraine
SLEEP MAPS,Experimental/Post Metal,United States
SLEEP REBELLION,Crossover Prog,United States
SLEEP SIREN,Progressive Metal,United States
SLEEP TERROR,Tech/Extreme Prog Metal,United States
SLEEP TOKEN,Post Rock/Math rock,United Kingdom
SLEEPERS AWAKE,Progressive Metal,United States
SLEEPIN PILLOW,Psychedelic/Space Rock,Greece
SLEEPING IN GETHSEMANE,Experimental/Post Metal,United States
SLEEPING IN TRAFFIC,Progressive Metal,Canada
SLEEPING PANDORA,Psychedelic/Space Rock,Germany
SLEEPING PEOPLE,Post Rock/Math rock,United States
SLEEPLESS,Crossover Prog,Israel
SLEEPMAKESWAVES,Post Rock/Math rock,Australia
SLEEPSTREAM,Post Rock/Math rock,Greece
SLEEPWALKER SUN,Progressive Metal,Brazil
SLEEPY HOLLOW,Crossover Prog,United States
SLEEPY PEOPLE,Eclectic Prog,United Kingdom
SLEEPY SUN,Psychedelic/Space Rock,United States
SLEEPYTIME GORILLA MUSEUM,RIO/Avant-Prog,United States
FRANCISC LEPOY,RIO/Avant-Prog,Argentina
JIM LEVIN,Prog Folk,Ireland
SLICE THE CAKE,Tech/Extreme Prog Metal,United Kingdom
JULI LICK,Eclectic Prog,United States
SLIM CHARLES,Crossover Prog,United States
SLINT,Prog Related,United States
SLIVOVITZ,Jazz Rock/Fusion,Italy
SLOCHE,Jazz Rock/Fusion,Canada
SLOGANS,Rock Progressivo Italiano,Italy
SLOVO MIRA,Psychedelic/Space Rock,Russia
SLOW ELECTRIC,Crossover Prog,Multi-National
TH LOW LIGHT,Psychedelic/Space Rock,Australia
SLOW MOTION REIGN,Neo-Prog,United States
SLOW RIDE HOME,Psychedelic/Space Rock,Ukraine
SLOW SIX,Post Rock/Math rock,United States
(THE) LOWEST RUNNER (IN ALL THE WORLD),Post Rock/Math rock,United States
TH LOWMOVIES,Jazz Rock/Fusion,Italy
SLOWS,Progressive Electronic,United Kingdom
SLP,Heavy Prog,Canada
SLUG COMPARISON,Crossover Prog,Canada
SLUGDGE,Tech/Extreme Prog Metal,United Kingdom
SLYCHOSIS,Neo-Prog,United States
TH LYDE,Progressive Metal,Canada
SMAK,Jazz Rock/Fusion,Yugoslavia
SMALLMAN,Experimental/Post Metal,Bulgaria
SMALLTAPE,Crossover Prog,Germany
SMASH,Indo-Prog/Raga Rock,Spain
SMASH THE CRASH,Jazz Rock/Fusion,Poland
SMEGMA,RIO/Avant-Prog,United States
SMELL OF INCENSE,Prog Folk,Norway
TH MILE,Crossover Prog,United Kingdom
CHA MITH'S BOMBASTIC MEATBATS,Jazz Rock/Fusion,United States
MALCOL MITH,Eclectic Prog,United States
NATHAN PARKE MITH,Jazz Rock/Fusion,United States
SMOHALLA,Experimental/Post Metal,France
SMOKE,Jazz Rock/Fusion,United States
SMOKESTACK FAERIE,Prog Folk,Finland
SMOKING SPORE,Psychedelic/Space Rock,United States
MAR MOOT,Neo-Prog,United States
SMOTE,Krautrock,United Kingdom
SNAILFACE,Heavy Prog,United States
SNAKE OIL,RIO/Avant-Prog,France
SNAKE OIL,Psychedelic/Space Rock,United States
SNAKEFINGER,RIO/Avant-Prog,United Kingdom
SNAKES ALIVE,Crossover Prog,Australia
SNAKES DON'T BELONG IN ALASKA,Psychedelic/Space Rock,United Kingdom
SNARLING ADJECTIVE CONVENTION,RIO/Avant-Prog,United States
SNC,Psychedelic/Space Rock,Italy
GRE NEDDON,Crossover Prog,Australia
MIR NELDER,Eclectic Prog,Netherlands
TH NOBS,Krautrock,France
SIGMUN NOPEK III,Eclectic Prog,United States
SNOVI,Psychedelic/Space Rock,Croatia
VICTO NOW,Crossover Prog,United States
SNOWBALL,Jazz Rock/Fusion,Germany
SNOWBLOOD,Experimental/Post Metal,United Kingdom
SNOWDONIA,Neo-Prog,Spain
SNOWMAN,Neo-Prog,Portugal
SO DOES YOUR MOTHER,Crossover Prog,Italy
SO IS THE TONGUE,Experimental/Post Metal,United States
SOCIAL TENSION,Symphonic Prog,Japan
TH OCIETŔ ANONIMA DECOSTRUZIONISMI ORGANICI,RIO/Avant-Prog,Italy
L OCIETE DES TIMIDES Ŕ LA PARADE DES OISEAUX,RIO/Avant-Prog,France
SOCIONIC,Progressive Metal,United States
SOCKARIS,Progressive Metal,Mexico
SOEN,Experimental/Post Metal,Multi-National
SOFT HEAP,Canterbury Scene,United Kingdom
SOFT HEARTED SCIENTISTS,Prog Folk,United Kingdom
SOFT MACHINE LEGACY,Canterbury Scene,United Kingdom
TH OFT MACHINE,Canterbury Scene,United Kingdom
SOFT MOUNTAIN,Canterbury Scene,Multi-National
SOFT WORKS,Canterbury Scene,United Kingdom
SOFTEN THE GLARE,Jazz Rock/Fusion,United States
SOFTWARE,Progressive Electronic,Germany
I OGNO DI RUBIK,Rock Progressivo Italiano,Italy
SOL INVICTUS,Prog Folk,United Kingdom
SOL KIA,Experimental/Post Metal,Belgium
SOLACE SUPPLICE,Heavy Prog,France
SOLANACEAE,Prog Folk,Denmark
SOLAR ARCHITECT,Heavy Prog,Canada
SOLAR CORONA,Psychedelic/Space Rock,Portugal
SOLAR GLORY,Psychedelic/Space Rock,United States
SOLAR PLEXUS,Jazz Rock/Fusion,Sweden
SOLAR PROJECT,Psychedelic/Space Rock,Germany
SOLAR SOMA,Crossover Prog,Australia
SOLAR WIND,Eclectic Prog,Israel
SOLARFERENCE,Prog Folk,United Kingdom
SOLARHALL,Heavy Prog,Finland
SOLARIS,Symphonic Prog,Hungary
EINA OLBERG,Crossover Prog,Norway
SOLE REMEDY,Progressive Metal,Finland
SOLEDAD,Progressive Metal,France
SOLEFALD,Tech/Extreme Prog Metal,Norway
SOLID GROUND,Crossover Prog,Montenegro
SOLID VISION,Progressive Metal,Italy
SOLIS,Neo-Prog,Brazil
SOLIS LACUS,Jazz Rock/Fusion,Belgium
SOLITUDE,Crossover Prog,Ukraine
SOLKYRI,Post Rock/Math rock,Australia
SOLSTAFIR,Experimental/Post Metal,Iceland
SOLSTICE,Neo-Prog,United Kingdom
SOLSTICE,Jazz Rock/Fusion,Canada
SOLSTICE COIL,Prog Related,Israel
SOLTERRA,Crossover Prog,United States
SOLUM,Heavy Prog,Sweden
SOLUS3,Eclectic Prog,United Kingdom
SOLUTION,Jazz Rock/Fusion,Netherlands
SOLUTION SCIENCE SYSTEMS,Heavy Prog,United States
SOM IMAGINÁRIO,Psychedelic/Space Rock,Brazil
SOM NOSSO DE CADA DIA,Eclectic Prog,Brazil
SOMA,Psychedelic/Space Rock,United Kingdom
SOMA,Jazz Rock/Fusion,United States
SOMA PLANET,Eclectic Prog,Spain
SOMA WHITE,Crossover Prog,Poland
SOMALGIA,Experimental/Post Metal,United Kingdom
SOMALI YACHT CLUB,Psychedelic/Space Rock,Ukraine
SOMBRE HOLIDAY,Progressive Metal,United States
SOMBRE REPTILE,Jazz Rock/Fusion,France
SOMEWHERE IN THE SKY,Crossover Prog,Greece
SOMMA,Post Rock/Math rock,Russia
SOMNAMBULIST,Crossover Prog,United States
SOMNURI,Experimental/Post Metal,United States
SONAR,Psychedelic/Space Rock,Hungary
SONAR,RIO/Avant-Prog,Switzerland
SONCNA POT,Jazz Rock/Fusion,Yugoslavia
SONIC BOOM,Psychedelic/Space Rock,United Kingdom
SONIC DEBRIS,Progressive Metal,Norway
SONIC DESOLUTION,Heavy Prog,Sweden
SONIC PULSAR,Crossover Prog,Portugal
TH ONIC SHAMEN,Psychedelic/Space Rock,United Kingdom
SONIC SIGHT,Neo-Prog,Norway
SONIC TAPESTRY,Neo-Prog,United Kingdom
SONIC TRIP PROJECT,Psychedelic/Space Rock,United Kingdom
SONIQ CIRCUS,Heavy Prog,Sweden
SONIQ THEATER,Crossover Prog,Germany
SONISK BLODBAD,Progressive Electronic,Multi-National
SONNA,Post Rock/Math rock,United States
SONNÖV,Post Rock/Math rock,Spain
SONORA SUNRISE,Psychedelic/Space Rock,Russia
SONORHC,Psychedelic/Space Rock,France
SONOROUS DYNAMO,Progressive Metal,Switzerland
SONS OF ALPHA CENTAURI,Experimental/Post Metal,United Kingdom
SONS OF APOLLO,Progressive Metal,United States
SONS OF CEPHEIDS,RIO/Avant-Prog,United States
SONS OF SEASONS,Progressive Metal,Germany
SONS OF ZEVEDEUS,Eclectic Prog,Greece
SONTAAG,Psychedelic/Space Rock,United Kingdom
SONUS UMBRA,Crossover Prog,United States
BRUC OORD,Crossover Prog,United Kingdom
SOPHIE'S EARTHQUAKE,Psychedelic/Space Rock,Germany
SOPHISTREE,Eclectic Prog,Germany
NICKLA ŘRENSEN,Psychedelic/Space Rock,Denmark
L ORGENTE,Rock Progressivo Italiano,Italy
SORNE,Prog Folk,United States
ALA ORRENTI,Rock Progressivo Italiano,Italy
SORROWFUL WINDS,Progressive Metal,Greece
SORRY NO FERRARI,Heavy Prog,United States
SOT,RIO/Avant-Prog,Norway
SOTOS,RIO/Avant-Prog,France
SOUL CAGES,Progressive Metal,Germany
SOUL DOUBT,Progressive Metal,Italy
SOUL ENEMA,Eclectic Prog,Israel
SOUL SECRET,Progressive Metal,Italy
TH OULBREAKER COMPANY,Psychedelic/Space Rock,Spain
SOULENGINE,Symphonic Prog,Italy
SOULJOURNERS,Progressive Metal,United States
SOULS IGNITE,Crossover Prog,Argentina
SOULS VIBRATING IN THE UNIVERSE,Post Rock/Math rock,United Kingdom
SOULSPLITTER,Progressive Metal,Germany
SOUND & SHAPE,Heavy Prog,United States
SOUND GOAT PROJECT,Heavy Prog,Poland
SOUND HORIZON,Crossover Prog,Japan
TH OUND OF ANIMALS FIGHTING,Heavy Prog,United States
SOUND OF CONTACT,Crossover Prog,Multi-National
SOUND OF SILENCE,Progressive Metal,Greece
SOUNDARCADE,Psychedelic/Space Rock,Latvia
SOUNDDIARY,Crossover Prog,Austria
SOUNDGEIST,Progressive Metal,Greece
SOUNDRISE,Crossover Prog,Italy
SOUNDS LIKE THE END OF THE WORLD,Post Rock/Math rock,Poland
SOUNDS OF NEW SOMA,Progressive Electronic,Germany
SOUNDSCAPE,Progressive Metal,United States
SOUP,Crossover Prog,Norway
SOUR,Psychedelic/Space Rock,Colombia
SOURCE,Progressive Metal,United States
TH OURCE,Crossover Prog,United States
SOUTH HARBOUR,Experimental/Post Metal,Denmark
SOUTH OF NO NORTH,Krautrock,Belgium
SOUTHERN CROSS,Progressive Metal,Canada
SOUTHERN EMPIRE,Crossover Prog,Australia
SOUVARIS,Post Rock/Math rock,United Kingdom
SOUVENIR'S YOUNG AMERICA,Post Rock/Math rock,United States
SPACE ALLIANCE,Progressive Electronic,Italy
SPACE ART,Progressive Electronic,France
SPACE CIRCUS,Jazz Rock/Fusion,Japan
SPACE DEBRIS,Psychedelic/Space Rock,Germany
SPACE DRUIDS,Psychedelic/Space Rock,Russia
SPACE EXPLOSION,Krautrock,Germany
SPACE IN SPACE,Crossover Prog,Croatia
SPACE INVADERS,Psychedelic/Space Rock,Germany
SPACE JUNK IS FOREVER,Eclectic Prog,United States
SPACE KITCHEN,Crossover Prog,Canada
SPACE MACHINE,Progressive Electronic,Japan
SPACE MIRRORS,Psychedelic/Space Rock,Multi-National
SPACE MONSTER,Crossover Prog,Canada
SPACE MUSHROOM FUZZ,Psychedelic/Space Rock,United States
SPACE ODYSSEY,Progressive Metal,Sweden
SPACE RITUAL,Psychedelic/Space Rock,United Kingdom
THE PACE SPECTRUM,Psychedelic/Space Rock,Germany
SPACE SWEEPER,Progressive Electronic,United States
SPACEBOX,Krautrock,Germany
SPACECRAFT,Progressive Electronic,France
SPACED OUT,Jazz Rock/Fusion,Canada
SPACEHEAD,Psychedelic/Space Rock,United Kingdom
SPACEKING,Experimental/Post Metal,Russia
TH PACELORDS,Psychedelic/Space Rock,Germany
SPACEMEN 3,Psychedelic/Space Rock,United Kingdom
SPACES,Jazz Rock/Fusion,United States
SPACES,Post Rock/Math rock,United States
SPACESEED,Psychedelic/Space Rock,United States
SPACESHIP,Jazz Rock/Fusion,United States
TH PACIOUS MIND,Psychedelic/Space Rock,Sweden
TON PADA,Jazz Rock/Fusion,United States
SPALTKLANG,RIO/Avant-Prog,Switzerland
SPARIFANKAL,Prog Folk,Germany
SPARKLE IN GREY,Post Rock/Math rock,Italy
SPARKS,Crossover Prog,United States
SPARROWS SWARM AND SING,Post Rock/Math rock,United States
SPASTIC INK,Tech/Extreme Prog Metal,United States
SPATIAL MOODS,Psychedelic/Space Rock,Peru
SPEAKER GAIN TEARDROP,Post Rock/Math rock,Japan
SPEAKING TO STONES,Progressive Metal,United States
SPECIAL OTHERS,Jazz Rock/Fusion,Japan
SPECIAL PROVIDENCE,Progressive Metal,Hungary
SPECIES BEING,RIO/Avant-Prog,United States
SPECIMEN 37,Psychedelic/Space Rock,United States
SPECIMEN13,Eclectic Prog,Canada
SPECTRAL INCURSION,Tech/Extreme Prog Metal,United States
SPECTRUM,Heavy Prog,Chile
SPECTRUM,Crossover Prog,Australia
SPECTRUM ROAD,Jazz Rock/Fusion,Multi-National
SPEECHLESS,Crossover Prog,United States
SPEED LIMIT,Jazz Rock/Fusion,France
SPEED; GLUE AND SHINKI,Psychedelic/Space Rock,Japan
SPEKTAKEL,Eclectic Prog,Germany
SPEKTAR,Crossover Prog,Yugoslavia
ROMA PEKTOR,Crossover Prog,Israel
SPEKTRUM,Neo-Prog,Sweden
SPERM,Progressive Electronic,Finland
SPERRMÜLL,Krautrock,Germany
SPETTRI,Heavy Prog,Italy
SPHERE 3,Jazz Rock/Fusion,United Kingdom
SPHERE OF SOULS,Progressive Metal,Netherlands
SPHERIC UNIVERSE EXPERIENCE,Progressive Metal,France
SPHEROE,Jazz Rock/Fusion,France
SPHINX,Symphonic Prog,Multi-National
SPIN,Jazz Rock/Fusion,Netherlands
SPIN XXI,Symphonic Prog,Brazil
SPINETTA JADE,Jazz Rock/Fusion,Argentina
SPINIFEX,RIO/Avant-Prog,Netherlands
SPINOZARRE,Experimental/Post Metal,France
SPIRAL,Psychedelic/Space Rock,United States
SPIRAL ARCHITECT,Tech/Extreme Prog Metal,Norway
SPIRAL DRIVE,Psychedelic/Space Rock,Germany
SPIRAL GALAXY,Krautrock,United States
SPIRAL KEY,Crossover Prog,United Kingdom
SPIRAL ORCHESTRA,Symphonic Prog,Switzerland
SPIRAL REALMS,Psychedelic/Space Rock,United Kingdom
SPIRALING,Crossover Prog,United States
SPIRALMAZE,Psychedelic/Space Rock,Greece
SPIRES,Tech/Extreme Prog Metal,United States
SPIRES THAT IN THE SUNSET RISE,Prog Folk,United States
SPIRIT,Proto-Prog,United States
TH PIRIT OF CHRISTMAS,Eclectic Prog,Canada
SPIRIT OF THE MATTER,Psychedelic/Space Rock,France
SPIRITCZUALIC ENHANCEMENT CENTER,Krautrock,Germany
SPIRITS BURNING,Psychedelic/Space Rock,Multi-National
SPIRITS OF THE DEAD,Crossover Prog,Norway
TH PIRITS OF THE EARTH,Psychedelic/Space Rock,United Kingdom
SPIROGYRA,Prog Folk,United Kingdom
SPIROSFERA,Eclectic Prog,Italy
SPITZEN,Neo-Prog,Netherlands
SPLASH,Jazz Rock/Fusion,Sweden
SPLEEN ARCANA,Crossover Prog,France
SPLINK,Psychedelic/Space Rock,United Kingdom
SPLINTER,Neo-Prog,Netherlands
SPLIT BEARING,Progressive Metal,Czech Republic
SPLIT ENZ,Crossover Prog,New Zealand
SPOCK'S BEARD,Symphonic Prog,United States
SPOKE OF SHADOWS,Heavy Prog,United States
SPONTANEOUS COMBUSTION,Psychedelic/Space Rock,United Kingdom
SPOOKY TOOTH,Proto-Prog,United Kingdom
SPRIGGAN MIST,Prog Folk,United Kingdom
SPRIGUNS (OF TOLGUS),Prog Folk,United Kingdom
SPRING,Eclectic Prog,United Kingdom
SPRING & YOUTH,Experimental/Post Metal,Serbia
SPROINGG,Eclectic Prog,Germany
TH PUR,Progressive Metal,Germany
SPURV,Post Rock/Math rock,Norway
SQUACKETT,Crossover Prog,United Kingdom
SQUADRA OMEGA,Psychedelic/Space Rock,Italy
SQUALUS,Experimental/Post Metal,United States
SQUAREPUSHER,Jazz Rock/Fusion,United Kingdom
SQUARTET,RIO/Avant-Prog,Italy
SQUAT CLUB,Heavy Prog,Australia
SQUID,Post Rock/Math rock,United Kingdom
SQUINTALOO,Eclectic Prog,Germany
CHRI QUIRE,Symphonic Prog,United Kingdom
SQUONK OPERA,Crossover Prog,United States
SRI AUROBINDO,Psychedelic/Space Rock,United States
SROD,Progressive Metal,Venezuela
ST 37,Psychedelic/Space Rock,United States
ST MIKAEL,Psychedelic/Space Rock,Sweden
ST. CLAIRE,Symphonic Prog,Japan
ST. ELMO'S FIRE,Heavy Prog,United States
ST. HELENA,Eclectic Prog,Norway
ST. KRAUT,Krautrock,Russia
ST. QUENTIN,Heavy Prog,Germany
ST.-TROPEZ,Rock Progressivo Italiano,Italy
ST.ERHART,Jazz Rock/Fusion,France
STA IMA?,Eclectic Prog,Croatia
STABAT AKISH,RIO/Avant-Prog,France
MARTI TACEY,Progressive Metal,United States
STACKRIDGE,Prog Folk,United Kingdom
STAFF CARPENBORG AND THE ELECTRIC CORONA,Krautrock,Germany
STAGG,Jazz Rock/Fusion,Germany
UN TAGIONE ALL' INFERNO,Rock Progressivo Italiano,Italy
STAGNANT WATERS,Experimental/Post Metal,France
STAIRCASES,Psychedelic/Space Rock,United States
STALINGRAD,Experimental/Post Metal,Spain
STALINGRAD 119,Zeuhl,France
STALLION,Crossover Prog,United Kingdom
STAN D'ART,Eclectic Prog,Poland
STAN UND HILDA,Krautrock,Germany
MARIO LIN TANCATI,Progressive Electronic,Italy
STANDARTE,Heavy Prog,Italy
STANDING OVATION,Experimental/Post Metal,Finland
MAR TANLEY,RIO/Avant-Prog,United States
STAR FK RADIUM,Post Rock/Math rock,United States
STAR ONE,Progressive Metal,Netherlands
STAR PEOPLE,Crossover Prog,United States
STAR PERIOD STAR,Eclectic Prog,United States
STARA RZEKA,Krautrock,Poland
STARBREAKER,Progressive Metal,United States
STARCASTLE,Symphonic Prog,United States
STARDRIVE,Progressive Electronic,United States
STARE AT THE CLOUDS,Experimental/Post Metal,Australia
STARGAZER,Tech/Extreme Prog Metal,Australia
TH TARGAZER'S ASSISTANT,Progressive Electronic,United Kingdom
STARKWEATHER,Tech/Extreme Prog Metal,United States
STARLESS,Crossover Prog,Japan
STAROSTA,Crossover Prog,Argentina
STARQUAKE,Neo-Prog,Germany
STARRING,RIO/Avant-Prog,United States
STARS AND STIPS,Crossover Prog,Netherlands
TH TARS,Psychedelic/Space Rock,Japan
STARSCREAM,Post Rock/Math rock,United States
STARVING DAUGHTERS,Psychedelic/Space Rock,United States
STATE OF MIND,Progressive Metal,Italy
STATE URGE,Crossover Prog,Poland
STATIC LIMIT,Progressive Metal,United States
STATS,Experimental/Post Metal,United States
STATUA,Post Rock/Math rock,Philippines
STATUS MINOR,Progressive Metal,Finland
STAVO,Heavy Prog,United States
L TAZIONE DELLE FREQUENZE,Rock Progressivo Italiano,Italy
RAFAE TCRUZ,Crossover Prog,Brazil
STEAK NUMBER EIGHT,Experimental/Post Metal,Belgium
STEALING AXION,Tech/Extreme Prog Metal,United States
STEALING THE FIRE,Neo-Prog,United Kingdom
STEAM THEORY,Crossover Prog,United States
STEAMBOAT SWITZERLAND,RIO/Avant-Prog,Switzerland
STEAMHAMMER,Crossover Prog,United Kingdom
STEARICA,Post Rock/Math rock,Italy
MICHAE TEARNS,Progressive Electronic,United States
STEEL MILL,Heavy Prog,United Kingdom
STEELEYE SPAN,Prog Related,United Kingdom
STEELY DAN,Jazz Rock/Fusion,United States
SIMO TEENSLAND,RIO/Avant-Prog,Sweden
STEEO,Psychedelic/Space Rock,Italy
STEEP,Jazz Rock/Fusion,United States
VLATK TEFANOVSKI,Prog Folk,Macedonia
STEGOR,Crossover Prog,United States
STEIN,Progressive Metal,Israel
ROBB TEINHARDT,Symphonic Prog,United States
STELLA LEE JONES,Eclectic Prog,Japan
STELLAR CIRCUITS,Progressive Metal,United States
STELLARDRONE,Progressive Electronic,Lithuania
L TELLE DI MARIO SCHIFANO,Rock Progressivo Italiano,Italy
STENCIL FOREST,Symphonic Prog,United States
STEP AHEAD,Neo-Prog,France
STEP INTO LIQUID,Progressive Metal,Germany
STEPAN PROJECT,Crossover Prog,Romania
STEPMOTHER,RIO/Avant-Prog,Multi-National
STERBUS,RIO/Avant-Prog,Italy
STEREOCHROME,Psychedelic/Space Rock,United States
STEREOKIMONO,Psychedelic/Space Rock,Italy
STERLING,Post Rock/Math rock,United States
STERN-COMBO MEISSEN (STERN MEISSEN),Symphonic Prog,Germany
STEVEGANE PROJECT,Crossover Prog,France
MAT TEVENS,Crossover Prog,United Kingdom
STICK MEN,Eclectic Prog,United States
STICKS IN THE CASINO,Heavy Prog,Germany
STICKY BRAIN,Jazz Rock/Fusion,Italy
STILL,Crossover Prog,United States
STILL LIFE,Heavy Prog,United Kingdom
STIMPY LOCKJAW,Eclectic Prog,United States
ALA TIVELL,Prog Folk,France
BRA TOCK,Crossover Prog,United States
LYN TOKES & SOL SURFERS,Crossover Prog,United States
STOLAS,Heavy Prog,United States
STOLEN EARTH,Crossover Prog,United Kingdom
STOLEN MEMORIES,Progressive Metal,France
ROIN TOLT,Symphonic Prog,Sweden
STÖMB,Progressive Metal,France
STONE ANGEL,Prog Folk,United Kingdom
STONE BREATH,Prog Folk,United States
STONE CIRCLE,Tech/Extreme Prog Metal,United Kingdom
STONE HEALER,Experimental/Post Metal,United States
STONED DIPLODOCUS,Post Rock/Math rock,France
STONEHENGE,Symphonic Prog,France
STONEHENGE,Progressive Metal,Hungary
STOP MOTION ORCHESTRA,RIO/Avant-Prog,United States
JEREM TORCH,Eclectic Prog,United States
STORCHI,Experimental/Post Metal,Israel
STORK,Tech/Extreme Prog Metal,United States
STORM AT SUNRISE,Heavy Prog,United States
STORM CORROSION,Eclectic Prog,Multi-National
TORM OF LIGHT,Experimental/Post Metal,United States
TH TORM,Heavy Prog,Spain
STORMS,Post Rock/Math rock,Croatia
STORMY ATMOSPHERE,Progressive Metal,Israel
STORMY SIX,RIO/Avant-Prog,Italy
STÓRSVEIT NIX NOLTES,Prog Folk,Iceland
STORYTELLER,Prog Folk,United Kingdom
STRAMONIO,Progressive Metal,Italy
STRANAFONIA,Rock Progressivo Italiano,Italy
STRANGE CHANGES,RIO/Avant-Prog,United States
STRANGE DAYS,Prog Folk,United Kingdom
TH TRANGE DEATH OF LIBERAL ENGLAND,Post Rock/Math rock,United Kingdom
STRANGE LAND,Progressive Metal,United States
STRANGE POP,Crossover Prog,Poland
STRANGEFISH,Neo-Prog,United Kingdom
STRANGER AEONS,Progressive Metal,Lithuania
TH TRANGER,Progressive Metal,Australia
STRANGERS ON A TRAIN,Neo-Prog,United Kingdom
STRATEGY,Heavy Prog,United States
DEMETRI TRATOS,Rock Progressivo Italiano,Italy
STRATOSPHEERIUS,Crossover Prog,United States
RO TRATTMAN,Crossover Prog,United States
STRATUS LUNA,Jazz Rock/Fusion,Brazil
STRAWBERRY FIELDS,Prog Related,Poland
STRAWBERRY GIRLS,Post Rock/Math rock,United States
STRAWBS,Prog Folk,United Kingdom
STREAM OF CONSCIOUSNESS,Progressive Metal,Switzerland
STREAM OF CONSCIOUSNESS,Progressive Metal,United States
STREAM OF PASSION,Prog Related,Netherlands
STREETDANCER,Jazz Rock/Fusion,United States
STREETMARK,Psychedelic/Space Rock,Germany
PEKK TRENG,Prog Folk,Finland
STRETCH IT TO THE LIMIT,Jazz Rock/Fusion,Peru
STRIDE,Progressive Metal,United States
STRING CHEESE,Prog Folk,United States
STRING CONNECTION,Jazz Rock/Fusion,Poland
STRING DRIVEN THING,Prog Folk,United Kingdom
STRINGPURÉE BAND,Eclectic Prog,Finland
STRINGS ARGUMENTS,Jazz Rock/Fusion,Japan
STRIPSEARCH,RIO/Avant-Prog,United States
STROBE,Psychedelic/Space Rock,United Kingdom
STROMBOLI,Jazz Rock/Fusion,Czech Republic
STRUCTURAL DISORDER,Progressive Metal,Sweden
STUBBORN TINY LIGHTS VS CLUSTERING DARKNESS FOREVER OK,Post Rock/Math rock,United States
STUBBS,Canterbury Scene,Japan
STUDIO KOSMISCHE,Progressive Electronic,United Kingdom
DARY TUERMER,Jazz Rock/Fusion,United States
STULL,Psychedelic/Space Rock,United States
STUMARI,Prog Folk,Georgia
STUMP,Crossover Prog,United Kingdom
STUPID COSMONAUT,Psychedelic/Space Rock,United Kingdom
STYX,Prog Related,United States
SUB,Krautrock,Germany
SUB ROSA,Crossover Prog,Brazil
SUBARACHNOID SPACE,Psychedelic/Space Rock,United States
SUBINTERIOR,Progressive Electronic,Italy
SUBJECT TO THOUGHTS,Crossover Prog,United States
SUBLIMINAL,Symphonic Prog,Argentina
SUBLUNAR,Heavy Prog,Poland
SUBMARINE SILENCE,Rock Progressivo Italiano,Italy
SUBROSA,Experimental/Post Metal,United States
SUBSIGNAL,Neo-Prog,Germany
SUBSPACE RADIO,Heavy Prog,Finland
SUBTERRA,Neo-Prog,Chile
SUBTERRANEAN MASQUERADE,Experimental/Post Metal,Multi-National
SUBTILIOR,RIO/Avant-Prog,Italy
SUBURBANO,Prog Folk,Spain
SUBWAY,Prog Folk,Multi-National
JAME UDAKOW,Eclectic Prog,United States
SUDOKU KILLER,RIO/Avant-Prog,Italy
SÜDSTERN 44,Psychedelic/Space Rock,Germany
SUFFERING HOUR,Tech/Extreme Prog Metal,United States
SUFFOCATE FOR FUCK SAKE,Experimental/Post Metal,Sweden
SUGARLOAF,Heavy Prog,United States
SUHY SILVERGOLD & ALVARADO,Jazz Rock/Fusion,United States
SUI GENERIS,Prog Related,Argentina
SUISHOU NO FUNE,Psychedelic/Space Rock,Japan
SUIT OF LIGHTS,Crossover Prog,United States
SUKELLUSVENE,Jazz Rock/Fusion,Finland
SUL DIVANO,Jazz Rock/Fusion,Argentina
SULA BASSANA,Psychedelic/Space Rock,Germany
JI ULLIVAN,Indo-Prog/Raga Rock,United Kingdom
SULPHAT' KETAMINE,Heavy Prog,France
SULPHUR,Tech/Extreme Prog Metal,Norway
SUMAC,Experimental/Post Metal,Multi-National
SUMDEUS,Psychedelic/Space Rock,United States
SUMMER BREEZE PROJECT,Neo-Prog,Netherlands
SUMMER FADES AWAY,Post Rock/Math rock,China
SUMMER INDOORS,Crossover Prog,United Kingdom
SUMMIT,Experimental/Post Metal,Italy
SUMO ELEVATOR,Eclectic Prog,Israel
SUN,Jazz Rock/Fusion,Germany
TH UN BLINDNESS,Psychedelic/Space Rock,Australia
SUN CAGED,Progressive Metal,Netherlands
SUN CITY GIRLS,RIO/Avant-Prog,United States
SUN COLORED CHAIR,Post Rock/Math rock,United States
SUN DIAL,Psychedelic/Space Rock,United Kingdom
TH UN OR THE MOON,Psychedelic/Space Rock,Germany
SUN TRAVELLERS,Crossover Prog,Multi-National
SUN TREADER,Jazz Rock/Fusion,United Kingdom
SUN WATCHER,Krautrock,United States
SUNBIRDS,Jazz Rock/Fusion,Multi-National
SUNBURNED HAND OF THE MAN,Psychedelic/Space Rock,United States
SUNCHILD,Crossover Prog,Ukraine
SUNDAY,Crossover Prog,United Kingdom
SÜNDENFALL II,Prog Folk,Germany
TH UNDERING,Crossover Prog,Italy
SUSANN UNDFŘR,Crossover Prog,Norway
SUNFOREST,Psychedelic/Space Rock,United Kingdom
SUNGOD,Psychedelic/Space Rock,United States
SUNGRAZER,Psychedelic/Space Rock,Netherlands
SUNHILLOW,Crossover Prog,Finland
SUNHOUSE,Jazz Rock/Fusion,Belgium
SUNLESS,Tech/Extreme Prog Metal,United States
SUNLESS DAWN,Tech/Extreme Prog Metal,Denmark
SUNLIGHT ASCENDING,Post Rock/Math rock,United States
SUNPATH,Progressive Metal,Germany
TH UNPILOTS,Crossover Prog,Australia
SUNPOCRISY,Experimental/Post Metal,Italy
SUNRISE AURANAUT,Crossover Prog,Russia
SUNRISE SUNSET PROJECT,Psychedelic/Space Rock,Russia
SUNSCAPE,Rock Progressivo Italiano,Italy
SUNSET IN THE 12TH HOUSE,Tech/Extreme Prog Metal,Romania
SUNSET MISSION,Crossover Prog,United States
SUNSET OF RA,Psychedelic/Space Rock,Greece
SUNYATA,Eclectic Prog,Singapore
SUOMEN TULLI,Crossover Prog,Finland
SUPAY,Prog Folk,Peru
SUPER FREEGO,Zeuhl,France
SUPER FURRY ANIMALS,Prog Related,United Kingdom
SUPER MASSIVE BLACK HOLES,Tech/Extreme Prog Metal,Canada
SUPER STRING THEORY,Progressive Metal,United States
SUPERCONTINENT,Experimental/Post Metal,United States
SUPERDENSECRUSHLOADFACTOR,RIO/Avant-Prog,Australia
SUPERDRAMA,Neo-Prog,Germany
SUPERFJORD,Psychedelic/Space Rock,Finland
SUPERFLUOUS MOTOR,Jazz Rock/Fusion,Canada
SUPERIOR,Progressive Metal,Germany
SUPERLUMINAL PACHYDERM,Eclectic Prog,United States
SUPERNAL ENDGAME,Crossover Prog,United States
SUPERNOVA,Symphonic Prog,Argentina
SUPERSISTER,Canterbury Scene,Netherlands
SUPERSTRING,RIO/Avant-Prog,Korea
SUPERTRAMP,Crossover Prog,United Kingdom
SUPERVISED,Progressive Metal,United States
SUPPER'S READY,Neo-Prog,Luxembourg
SUPPLY DEMAND & CURVE,Canterbury Scene,Ireland
SUPURATION,Tech/Extreme Prog Metal,France
SUR OCULTO,Jazz Rock/Fusion,Argentina
SUR PACIFICO,Prog Folk,Chile
SURFACE OF THE SUN,Progressive Metal,Canada
SURGERY,Jazz Rock/Fusion,Germany
SURPRISE,Symphonic Prog,United States
SURREAL,Crossover Prog,United States
SURVIVAL,Crossover Prog,Netherlands
SURYA KRIS PETERS,Progressive Electronic,Germany
TH USPENDED CONGRESS,Experimental/Post Metal,Ireland
SUSPENSION SOLAR,Crossover Prog,Argentina
SUSPIRIUM,Progressive Electronic,United Kingdom
SUSPYRE,Progressive Metal,United States
SUSSITA,Prog Folk,Israel
SUSTAIN,Symphonic Prog,Netherlands
MITSUR UTOH,Jazz Rock/Fusion,Japan
SUTRAH,Tech/Extreme Prog Metal,Canada
SUUK,Psychedelic/Space Rock,Estonia
SVANFRIDUR,Heavy Prog,Iceland
SVANN,Prog Related,Poland
SVARTBAG,Psychedelic/Space Rock,Denmark
SVENSKA PSYKVÄNNER,Psychedelic/Space Rock,Sweden
SVETAMUZIKA,Jazz Rock/Fusion,Russia
ROBER VILPA,Neo-Prog,United States
SVNTAX ERROR,Psychedelic/Space Rock,Australia
TH WAN CHORUS,Crossover Prog,United Kingdom
DA WANÖ,Tech/Extreme Prog Metal,Sweden
SWANS,Post Rock/Math rock,United States
SWAPPERS ELEVEN,Neo-Prog,Multi-National
SWARA SAMRAT,Krautrock,Germany
SWARM OF THE LOTUS ,Experimental/Post Metal,United States
WARM OF THE SUN,Experimental/Post Metal,Sweden
PETE WART,Crossover Prog,Netherlands
SWEDENBORG RAUM,Psychedelic/Space Rock,Germany
SWEDISH FAMILY,Symphonic Prog,Sweden
SWEEK,Post Rock/Math rock,Belgium
SWEEP THE LEG JOHNNY,Post Rock/Math rock,United States
SWEET FINGERS,Crossover Prog,Mexico
SWEET HOLE,Heavy Prog,Spain
SWEET MOTHER LOGIC,Post Rock/Math rock,Canada
SWEET POTATO,RIO/Avant-Prog,United Kingdom
SWEET SMOKE,Psychedelic/Space Rock,United States
SWEETWATER,Proto-Prog,United States
SWEVEN,Tech/Extreme Prog Metal,Sweden
SWIADECTWO DOJRZALOSCI,Jazz Rock/Fusion,Poland
SWIFAN EOLH & THE MUDRA CHOIR,Eclectic Prog,Norway
SWIM IN STYX,Tech/Extreme Prog Metal,France
SWIMS,Post Rock/Math rock,United States
SWINGERS,Post Rock/Math rock,Belgium
SWITCH OPENS,Experimental/Post Metal,Sweden
SWRM,Krautrock,United States
SYBAX,Post Rock/Math rock,France
SYBERIA,Post Rock/Math rock,Spain
SYD ARTHUR,Crossover Prog,United Kingdom
SYDERAL OVERDRIVE,Progressive Metal,Italy
SYDERALUS,Experimental/Post Metal,Argentina
SYK,Tech/Extreme Prog Metal,Italy
SYLBAT,Eclectic Prog,France
SYLVAN,Neo-Prog,Germany
NA YLVAN,Crossover Prog,Sweden
SYLVIA BLISS,Eclectic Prog,United States
DAVI YLVIAN,Crossover Prog,United Kingdom
SYLVIUM,Heavy Prog,Netherlands
SYMBYOSIS,Progressive Metal,France
SYMFINITY,Crossover Prog,United States
SYMMETRY/SYMMETRY,Crossover Prog,United States
SYMPHONIC HAZE,Crossover Prog,United States
SYMPHONIC SLAM,Prog Related,Canada
SYMPHONY,Progressive Metal,Poland
SYMPHONY X,Progressive Metal,United States
SYMPOZION,Jazz Rock/Fusion,Israel
TH YN,Psychedelic/Space Rock,United Kingdom
SYNANTHESIA,Prog Folk,United Kingdom
SYNAPSE,Progressive Metal,France
SYNCAGE,Eclectic Prog,Italy
SYNCATTO,Progressive Metal,United States
SYNCOPATED SILENCE,Zeuhl,Russia
SYNCOPE,Jazz Rock/Fusion,Canada
SYNCRISIS,Jazz Rock/Fusion,Germany
SYNCROMIND PROJECT,Progressive Metal,Germany
SYNDÉRESI,Rock Progressivo Italiano,Italy
SYNDONE,Rock Progressivo Italiano,Italy
SYNE,Heavy Prog,Italy
SYNEMA,Crossover Prog,United States
SYNERGY,Prog Related,United States
SYNERGY PROTOCOL,Progressive Metal,Netherlands
SYNESTHESIA,Progressive Metal,France
SYNESTHESIA,Progressive Metal,Dominican Republic
SYNKOKE,RIO/Avant-Prog,Norway
SYNKOPY,Eclectic Prog,Czech Republic
SYNOPSIS,Symphonic Prog,France
SYNOPSIS,Prog Related,Estonia
SYNTHESAX,Jazz Rock/Fusion,Germany
SYRIAK,Neo-Prog,Venezuela
SYRINX,Progressive Electronic,Canada
SYRINX,Jazz Rock/Fusion,France
SYRIUS,Eclectic Prog,Hungary
SYSTEMS THEORY,Psychedelic/Space Rock,United States
SYZYGY,Crossover Prog,United States
SYZYGY,Progressive Metal,Australia
WITOL ZCZUREK,Jazz Rock/Fusion,Poland
SZELA,Prog Folk,Poland
SZENTENDRE,RIO/Avant-Prog,France
HERMAN ZOBEL,RIO/Avant-Prog,Austria