Webopedia Staff
Last Updated May 24, 2021 7:56 am
Short for Tool Command Language, and pronounced T-C-L or tickle, a powerful interpreted programming language developed by John Ousterhout. One of the main strengths of Tcl is that it can be easily extended through the addition of custom Tcl libraries. It is used for prototyping applications as well as for developing CGI scripts, though it is not as popular as Perl for the latter.