Description:

KSH-93 is the most recent version of the KornShell Language described
in "The KornShell Command and Programming Language," by Morris Bolsky
and David Korn of AT&T Bell Laboratories, ISBN 0-13-182700-6. The
KornShell is a shell programming language, which is upward compatible
with "sh" (the Bourne Shell), and is intended to conform to the IEEE
P1003.2/ISO 9945.2 Shell and Utilities standard. KSH-93 provides an
enhanced programming environment in addition to the major
command-entry features of the BSD shell "csh". With KSH-93,
medium-sized programming tasks can be performed at shell-level without
a significant loss in performance. In addition, "sh" scripts can be
run on KSH-93 without modification.