On 2013-06-10 23:20, Jordi Guillaumes i Pons wrote: El 10/06/2013, a les 23:17, Johnny Billquist <bqt at softjar.se> va escriure: I think I read somewhere than the inspiration for the CP/M commands was RT-11, not TOPS-10. But, anyway, the RT-11 commands _are_ inspired by TOPS-10, which. by the way, sound a little bit like OS/8... :) I haven't read the article (yet), however I'm pretty sure I've seen in the past that CP/M was indeed inspired by TOPS-10, and nothing else. God knows if I can dig up any sources of that, though... The wikipedia is not a 100% reliable source, but... "CP/M's command line interface was patterned after the operating systems from Digital Equipment, such as RT-11 for the PDP-11and OS/8 for the PDP-8." Yeah, in this case I'd take Wikipedia with a large grain of salt... Actually, also, if you look further down the Wikipedia article on CP/M, you'll find this: "Various aspects of CP/M were influenced by the TOPS-10 operating system of the DECsystem-10 mainframe computer, which Kildall had used as a development environment." Isn't it wonderful how you'll find contradictory information even within the same article. This latter quote however, provides references... Johnny