Cool many thanks.

FYI: it's a great start.  It just the Terminal Control System part, there was about 5 or 6 subsystems, IIRC.  That's a fairly early version (1974) also, since its Fortran-IV.   Later versions in the late 70's/early 80s were in MORTRAN, BTW.  I remember an internal argument of the folks in the terminal group about if Plot 10's GKS system should be done in C - but FORTRAN still rules the day so, MORTRAN was the compromise.