SELECT "Computing mechanism" FROM table_72465 WHERE "Name" = 'Atanasoff–Berry Computer (US)'
what's the computing mechanbeingm with name being atanasoff berry computer (us)
CREATE TABLE table_72465 (
    "Name" text,
    "First operational" text,
    "Numeral system" text,
    "Computing mechanism" text,
    "Programming" text,
    "Turing complete" text
)