This gallery accompanies our story Gone but not forgotten: 10 operating systems the world left behind; please click through to that story to read the full text. Many thanks to the Personal Computer Museum, GUIdebook, Amiga Future and Wikimedia Commons for providing images.
CP/M was there at the beginning of the personal computing revolution, giving us the command line options we came to know and love and providing a template for two decades of DOS variations.
Shown here: CP/M-86 Version 1.0 running on an original IBM PC 5150 (top left and right); CP/M 2.2 on an Osborne 1 (bottom left); CP/M 2.2G on a Kaypro 10 (bottom right).
Credit: Personal Computer Museum