Those are called "Flexi-Discs" and music was even sometimes distributed that way.
On Mon, 8 Jul 2024 at 11:58, John R. Hogerhuis <jho...@pobox.com> wrote: > Here's a picture of floppy rom > > https://upload.wikimedia.org/wikipedia/commons/c/c8/FloppyRom_Magazine.jpg > > Says 33 1/3 RPM > > Meanwhile actual mask "ROMs" are "etched it stone" as it were. I'd guess > they'd be excellent long term storage. > > -- John. >
