[W/K] :: PDP-7

  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)