Sometimes classed as a client-side web programming language along with Javascript, Jscript and VBscript, TCL has a far wider range of uses, particularly in application integration, and it is possibly the most widely adopted language for automated hardware and software testing. TCL is free to download. It can be used to create cross-platform applications. TCL and its graphical user interface tool, TK, take care of platform-specific issues, such as look and feel. The language is very extensible; potentially, any application developed in TCL can add functionality to the language.
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