Rare computer cassettes from the early eighties. Specially designed for use with computers such as the Radio Shack Tandy TRS-80, Apple II, Commodore, etc...
Set of four, factory-sealed, cassettes with 20 minutes recording capacity (10 minutes per side). These are leaderless cassettes meaning that the user does not need to start the recorder and wait for the non-recordable leader to have passed the read/write head prior to start recording. Another advantage of these cassettes is that rewinding takes much less time than the typical 60 and 90 minutes cassettes.