I was really surprised to see this question asked. I had always assume it was a given that people knew that A: and B: were for floppies.

Just brings back memories of the days when I had one floppy drive. I had to load MS-DOS disk, then swap to my game disk.

Then when I had two floppy drives, I was jumping for joy. Now I don't need to swap disk.

The pain of installing MS Office 4.3 with a dozen floppy.

Ah ... the memories