The Free On-line Dictionary of Computing (30 December 2018):

NCR Corporation

    Electronics company mainly active in the midrange
   server market.

   NCR was founded 1884 as National Cash Register Company.  It
   joint the computer industry in th 1950s.  In 1991 it was
   absorbed by AT&T (see dinosaurs mating), only to be spat
   out again in 1996.

   NCR mainframes of the 1960's are remembered by some for
   their hardware incompatibility with IBM mainframes: NCR
   punched round holes in their punched cards while IBM punched
   rectangular ones.  The codes and machines were not compatible
   and information could not be easily shared between NCR and IBM
   customers.

   (http://ncr.com/).

   (1997-03-10)