Version 4 of shell

The word shell has various meanings. The most common use of the word, on Unix, is a script interpreter implementing some language, and intended to be used interactively or in batch by a user.

While technically, tclsh and wish applications are shells, in this use of the word, ksh, csh, etc. are more commonly thought of as shells than are tclsh or wish. See Unix shells for more discussion of this use of the word.

itcl has a base widget called a shell:

Docs can be found at http://incrtcl.sourceforge.net/iwidgets/iwidgets/shell.html and http://purl.org/tcl/home/man/iwidgets3.0/shell.n.html

Category Command, a part of incr Widgets