Extensible Shell

Extensible Shell

(operating system)(es) A Unix shell written by ByronRakitzis and Paul Haahr ,derived from rc. Es has real functions, closures,exceptions and lets you redefine most internal shelloperations.

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].