e/Es shell

Information
has gloss	eng: The es shell is a command line interpreter developed by Byron Rakitzis and Paul Haahr, that uses a scripting language similar to the rc shell of the Plan 9 operating system. It is intended to provide a fully functional programming language as a Unix shell. The bulk of es' development occurred in the early 1990s. A paper on an early version of the es shell was presented at the Winter 1993 USENIX conference in San Diego.
lexicalization	eng: es shell
instance of	(noun) (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory; "the market for software is expected to expand" software, software package, computer software, software system, package, software program