Nanoraptormicrodiskette
Charlie Stross@NanoRaptor I am now trying to recall where I left the 2" floppy disks for the Zenith MiniSport I used to own because I think I owe you a photo ...
@cstross I've seen the odd closeup of one, but not enough to get a real feel for how tiny they were.
('worryingly' is probably a good start)