Extensible Shell

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

Extensible Shell

   <operating system> (es) A {Unix} {shell} written by Byron
   Rakitzis <[email protected]> and Paul Haahr <[email protected]>,
   derived from {rc}.  Es has real {functions}, {closures},
   {exceptions} and lets you redefine most internal shell
   operations.

   Version: 0.84.

   (ftp://ftp.sys.utoronto.ca/pub/es/).

   ["Es - A Shell with Higher Order Functions", P. Haahr et al,
   Proc Winter 1993 Usenix Technical Conference].

   (1993-04-30)