Yes, it is. This is the start of the SPD (see http://www.mentec.com/SPDS/vaxrsx.html for the whole thing): SPD 26.73.08 VAX-11 RSX, Version 2.5 is a member of a family of operating system and other software products produced by Mentec Inc. for the PDP-11 family of computers. It is available from Mentec Inc. or Digital Equipment Corporation subject to a software license issued according to standard terms and conditions. Description: Overview VAX-11 RSX is an emulator of the RSX Operating System family which executes on all VAX systems. VAX-11 RSX runs in compatibility mode on processors that support a PDP-11 instruction set subset in hardware or microcode, and also runs on processors without this support by providing its own software emulation of the same PDP-11 instruction set subset. VAX-11 RSX provides special capabilities which enable PDP-11 users to develop programs for execution in the following environments: VMS compatibility mode (hardware-supported or software-emulated) RSX-11M-PLUS RSX-11M RSX-11S Micro/RSX VAX-11 RSX also allows for the migration of many existing RSX applications to VMS. No, it isn't, though last time I checked it was part of the CSLG. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927