Boost if you're old enough to know why I have one of these on my computer desk.
You can make the flip side usable or, if you’re bad enough at it, both sides unusable.
You can make the flip side usable or, if you’re bad enough at it, both sides unusable.
http://www.catb.org/jargon/html/F/flippy.html
You could use a hole punch to make another write notch on the other side of a single-sided floppy, doubling your disk space (though at the time most drives could only read one side at a time).
Some disks were also shipped without a write notch at all, so that you couldn’t replace whatever was on them; a hole punch gave you a free reusable floppy!
@rk I used to own a square hole punch that had a spacer that aligned the floppy to the exact position for the hole. I was a hit at the BBS parties, let me tell ya.