techmoan has made documentary videos that are about forgotten magnetic tape recording formats, such as the omni entertainment system, which uses 8-track tape storage, and the hipac, a successor of the playtape and related uses of it. other videos show some of the smallest and largest analog recording tape cartridges ever made, such as the picocassette for dictation machines or the cantata 700 background music system. further videos show other discontinued ¼-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.