On Mon, 13 May 2013 22:45:50 -0000, you wrote: This one for DECnet (7.04 version, the latest available): BB-X116D-BB Identified as "DECNET-10 V4.0 SUP 16MT9 1989" I thought that was only a supplemental tape that isn't particularly useful? Ah yes, now I remember everything: starting from some version I do not know (maybe just 7.04), DECnet binaries were bundled with CUSP tapes, and sources with Monitor tapes (see 704.BWR in the latter). The BB-X116D-BB tape is there just because it contains the key files needed to decrypt DECnet patches. Anything else in that tape is only for front-end DECnet support (DDCMP etc.). It contains NML.EXE too, which anyway will be replaced when installing TSUs, but until you patch TOPS-10, you'll need NML.EXE from the above tape. G. :)