pdp-7
     
         a minicomputer sold by dec in 1964.  it had a
        memory cycle time of 1.75 microseconds and add time of 4
        microseconds.  i/o included a keyboard, printer, paper-tape
        and dual transport dectape drives type 555.
     
        dec provided an "advanced" fortran ii compiler, a symbolic
        assembler, editor, ddt debugging system, maintenance
        routines and a library of arithmetic, utility and programming
        aids developed on the program-compatible pdp-4.
     
        dec sales brochure.
     
        the pdp-7 was considered reliable enough when properly
        programmed to be used for control of nuclear reactors and
        such.
     
        around 1970 ken thompson built the operating system that
        became unix on a scavenged pdp-7 so he could play a
        descendant of the spacewar game.
     
        1995-03-10
     
     
see also:
paper-tape fortran ii compiler assembler ddt pdp-4 
ken thompson operating system unix pdp-7 spacewar