Floppy-only PC with only blank floppies? No problem. | by Don Barber | Medium
5150: Setting up Tape Deck Connection (because the 5150 can) — voidstar
1981 - The IBM Pcjr can be an educational tool for use in the classroom and home. The system includes cassette Basic built into its Read Only Memory and a simple-to-follow booklet,
IBM Cassette Basic - RetroWeb Vintage Computer Museum