[zabzonk]

I'm also old enough, and we called both 8 and 5.25 disks, disks. Diskettes came around later, and that nomenclature was far from universal.

[thaumasiotes]

My elementary school had 5.25" disks, but 8" was before my time (and really, 5.25" almost is).

3.5" disks were called "disks", but occasionally something would refer to them as diskettes. Diskette was not a normal word for any context.