Ever Wonder Where Your B: Drive Is?
Yeah, so was this person who submitted the question to Ask Yahoo!
The short and simple answer:
The answer goes back to the glory days of floppy discs and DOS. The early DOS operating system designated two drives, A and B, strictly for floppy drives. Why? Because many early computers didn’t have native hard drives — they booted from Drive A, and ran applications from Drive B.
Later, as computers came with hard drives, the second floppy drive became a useless appendage — the computer equivalent of an appendix. To avoid confusion during the evolutionary window when computers with new hard drives coexisted beside computers with two floppies, the hard drives were given the “C” slot.
So there you have it.