Source : Free On-Line Dictionary of Computing

Mark 1
     
         (Or "Automatic Sequence Controlled Calculator") A
        {first generation computer} developed in 1944 by {Howard
        Aiken} of {Harvard University}.  The Mark 1 is seen as the
        first full-sized digital computer.  It weighed 5 tons, had 500
        miles of wiring, was used only for numeric calculations, and
        took three seconds to carry out one multiplication.
     
        [Mechanism?  Capacity?  Programmability?]
     
        (1996-11-24)