Apple II data cassette

The Apple II data cassette format was used to save programs and data on early Apple II computers. A similar format was used on the earlier Apple I. At the first release of the Apple II, the cassette was the only means of data storage, but by 1978 a floppy disk drive was available.

Format documentation

 * Apple cassette interface, 1 of 2 (Apple official site)
 * Apple cassette interface, 2 of 2 (Apple official site)
 * Apple cassette copy protection
 * Some discussion of Apple cassettes
 * Apple programs on cassette
 * Apple I Cassette Interface Manual