I'm old enough to remember what ABCD means!
A: Floppy Drive
B: Second Floppy Drive for floppy-to-floppy copy
C: Hard Drive
D: Optical Drive
In my time disk space was smaller than the addressing system which means partitions weren't warranted, whippersnapper!
lawd that takes me back. the first one from my childhood was
a: 3ยฝ"
b: 5ยผ"
c: hard-drive
and the day we got an optical drive was magical
D: being the optical drive was so hard for me to get used to (and i'm still not) because i'd learned to keep my data in a separate hard drive from my windows install long before we ever got one of those fancy schmancy "CD-ROM drives"
by the time i was regularly using a windows machine that only had one hard drive again optical drives were falling out of use...
I had a computer with a B: drive as a kid. Living large!
(At least, I remember I do, but memory can be a weird thing...)