https://www.techopedia.com/definition/3961/tool-command-language-tcl
According to 3 sources
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https://en.wikipedia.org/wiki/Tcl
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https://www.tcl-lang.org/about/
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https://www.tutorialspoint.com/tcl-tk/tcl_tk_quick_guide.htm
WebTcl/Tk Tutorial - Tcl is a general purpose multi-paradigm system programming language. It is a scripting language that aims at providing the ability for applications to communicate …
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