Umm, don't be too sure! I have several sets of backup tapes from one of the V6 machines at MIT, and those are also roughly 30 years old, and they are not in the best shape (they sat in my basement for most of that time). I sent one off to someone who specializes in reading old tapes, and he's gotten almost all the bits off of it (a few records had unrecoverable read errors, but the vast majority were OK - like roughly 15 read errors in around 1500 records). So do look for that tape (unless the material is all already online). I hope to annouce a vast trove of stuff soon from my tapes (once I figure out how to interpret the bits - they are written by a sui generis application called 'saveRVD', and the _only_ documentation of how it did it is... on that tape! :-) That includes a lot of code written at MIT, as well as stuff from elsewhere. Coming sbould be BCPL, Algol, LISP and some other languages; MACRO-11 and the DEC linker (which I guess are also available from UNSW tapes),but _also_ programs to convert back and forth from .REL to a.out format, and to .LDA format; and a whole ton of other applications (I have no idea what all is there - if anyone is interested, I can make a pass through my manuals and try and make a list). Noel