ITS version 671 from 1971 found

[Lars Brinkhoff via cctalk]

>From the incompatible department of classic computement: A rather
complete full dump of the MIT-AI PDP-10 from 1971 has been found.  It
includes full source code and documentation for the system, including
ITS version 671, DDT, TECO, MIDAS, (MAC)LISP, CHESS (MacHack), MUDDLE,
LOGO, MACSYMA, etc.