Originally short for Tool command language, Tcl is no longer an acronym and is an open-source scripting language that was developed by John Ousterhout. Tcl is available for different platforms and used to create useful software programs for almost any need. Below is an example of printing "Hello World!" in Tcl.
puts "Hello World!"
- Complete information about Tcl/Tk can be found at: http://www.tcl.tk/