1973 DEC 10 (a souped up PDP 6 w/ count 'em 36 bit word length) running TOPS-10 hacking FORTRAN IV on punched Holorith cards. We frosh weren't allowed to use the LA-120 (paper fed terminals). Eventually we learned the amazements of TECO for editing purposes (sort of like sed). Trees were in great supply back then. Of course programs were much, much shorter. Later got to play around with a GT40 graphics terminal with manual boot loader. Naturally it's primary use was to play Mars Lander..