'''Tool Command Language'''
Tcl is a dynamic programming language that is available on many platforms. --> Tcl is a dynamic programming language that is available on many platforms. Tcl is very flexible and consistent. For example, you can re-implement the "if" command within Tcl (see [Reimplementing the If Statement in Tcl])
* Tcl Cheat Sheet [http://home.houston.rr.com/brianohagan/tcl_tk_ref_guide.html] (PDF [http://www.rkeene.org/projects/info/resources/tcl/docs/tcl-tk-reference-guide.pdf])
* [Tcl and Threads]
Only in r6