I thought this was fun; stumbled upon it while looking for what words of
wisdom Fred had to share about the format of 3" disks:
https://books.google.com/books?id=7D0EAAAAMBAJ&pg=PA86&lpg=PA86&…
Hopefully Fred will see this and tell me whether the 3" disk format was MFM
or GCR given that the Orwellipedia says the 3" disk format was initially
designed to work with the Apple ][ floppy drive interface.
https://en.wikipedia.org/wiki/History_of_the_floppy_disk?fbclid=IwAR2atb2Z_…
Sellam