Further videos show other discontinued 14-inch-tape cartridge formats, such as the Sabamobil, which uses existing 3-inch open reels in a portable format, and the portable Sanyo Micro Pack 35, as well as RCA tape cartridge and the Sony Elcaset with another compromise of playtime and sound quality, oddities and gimmicks on Compact Cassettes as "reinventing the reel", several ways of autoreverse, automatic multiple cassette players, endless loop cassettes, and cassette mass production technology.
