bourne shell

from The Free On-line Dictionary of Computing (8 July 2008)
Bourne shell

   (sh, Shellish).  The original {command-line interpreter}
   {shell} and script language for {Unix} written by S.R. Bourne
   of {Bell Laboratories} in 1978.  sh has been superseded for
   interactive use by the {Berkeley} {C shell}, {csh} but still
   widely used for writing {shell scripts}.

   There were even earlier shells, see {glob}.  [Details?]

   {ash} is a Bourne Shell clone.

   ["Unix {Time-Sharing} System: The Unix Shell", S.R. Bourne,
   Bell Sys Tech J 57(6):1971-1990 (Jul 1978)].
    

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