From: "Steve Davidson" <jeep at scshome.net> The main target for the PDT-11 was RT-11. It was slow. The floppies spent a great deal of time seeking. Slow, but still a PDP-11! I had a /150 (plus VT62 and LA36) as my main computer when I was a frosh at RPI ('84-'85) and it was quite a bit above average compared to other personal computers at the time (C64, Apple ][, TRS-80, Atari 800, but IBM PCs were still rare -- so mostly fun toys with pretty graphics but slow and no disk space and usually no 80-column text). With 60 KB and most of the floppy/TU58 driver up in ROM space its free memory was at the very high end of MMU-less PDP-11s -- stuff fits in a PDT that won't run on a "real" LSI-11. John Wilson D Bit