XDA Developers on MSN

Windows lives on the C: drive, and the reason it's not called A: or B: goes back to the 1970s

In the era of floppy disks and early operating systems like CP/M and MS-DOS, A: and B: were reserved for floppy disk drives, ...
Hackaday

Cowgol Development Environment Comes To Z80 And CP/M

Cowgol on Z80 running CP/M ties together everything needed to provide a Cowgol development environment (including C and assembler) on a Z80 running the CP/M operating system, making it easier to get ...
PC Magazine

Osborne 1

The first portable computer, developed by Adam Osborne and introduced in 1981. Floppy disk based with 64K of memory, the Osborne 1 used the CP/M operating system and a modified version of the WordStar ...