{{stub}} {{language |hopl id=1729 }} {{implementation|UNIX Shell}} es - extensible shell by Paul Haahr and Byron Rakitzis

== Links ==

• [http://192.220.96.201/es/es-usenix-winter93.html Es: A shell with higher-order functions] (Usenix paper with errata)
• [ftp://ftp.sys.utoronto.ca/pub/es/ FTP site]