In David Korn Tells All , 2001-02-07, David Korn states that ksh93 should be compared to Tcl, in the sense that it is implemented as a reusable library with a C language API, and points to dtksh and tksh as an example of the embedability/extensibility of ksh93. In Playing the MacOS Shell Game , Cameron Laird argues in favour of ksh over tcsh.
ksh93 aims for compatibility with the Shell Language Standard part of POSIX, and can therefore be used as a Bourne Shell replacement.
Some of the overlap between Ksh and Tcl can be seen in these packages:
What: tkhistory Where: ftp://ftp.procplace.com/pub/tcl/sorted/packages-7.6/misc/tkhistory-2/tkhistory-2.tar.Z Description: A Tk 3.6 script that visually keeps track of the command history for csh, tcsh, and ksh. Updated: 11/2002 Contact: mailto:[email protected] (Rick McClanahan)