[Everything is a string].

[unknown]

[trace]

[send]

[introspection]

[the idea of scripting]

[event-oriented programming]

simplicity

slave [interp]reters

temporal arithmetic:  Among the [Tcl testimonials] is
[Tony Summerfelt]'s that, 
"if i need a program that does any kind of heavy duty date
manipulation
I use tcl.  The [clock] command is easily my favorite in tcl."

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[Jacob Levy] 2003-06-05 Methinks Tcl has the best and simplest thread abstraction available.















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Also see "[idiom]", "[What is the advantage of Tcl over Perl]", "[Beginning Tcl]", "[Tcl warts]", "[Arts and Crafts of Tcl-Tk Programming]", "[Is white space significant in Tcl]", "[Tcl Heritage]", "[What is Tcl]", "[Tcl and other languages]", [Is Tcl different!],
"Why to use Tcl" [http://phaseit.net/claird/comp.lang.tcl/tcl-why.html],
...