IEEE Computer Society Press, 1109 Spring Street, Suite 300, Silver Spring, MD 20910, USA, (Sep 17, 1993)Two volumes. IEEE Std 1003.2-1992 (includes IEEE Std 1003.2a-1992).
Approved September 17, 1992, IEEE Standards Board. Approved April
5, 1993, American National Standards Institute. The primary purpose
of this standard is to define a standard interface and environment
for application programs that require the services of a `shell' command
language interpreter and a set of common utility programs..