Source : Free On-Line Dictionary of Computing

Atanasoff-Berry Computer
     
         (ABC) The first electronic {digital computer} ever
        built.  The ABC was built between 1937 and 1942 by Dr. {John
        Vincent Atanasoff} and Clifford Berry at {Iowa State College}.
        It incorporated {binary} arithmetic, {regenerative memory},
        {parallel processing}, and separation of memory and computing
        functions.
     
        Ideas from the ABC were used in the design of {ENIAC}
        (1943-1946).
     
        {(http://www.cs.iastate.edu/jva/jva-archive.shtml)}.
     
        (2002-04-07)