This mini forum is intended to provide a simple means of discussion about the Digital Equipment Corporation 300 Professional series computer. If you want to share your own experience or memories, or add relevant information about this system: post a message!

The 300 Professional Series was, in truth, only "sort of" compatible with most of the PDP-11 line. Radically different interrupt hardware, and many other vital differences, meant that even the operating systems needed major modifications to work. Almost none of the software from the PDP-11 could run "as is". This left you what seemed like a fine machine with almost no software. For all of IBM''s faults they did a far better job here. Other things prevented this model series from catching on.