[DKF]: One thing that much software offers these days (e.g. [bash], the [Microsoft Windows%|%NT%|%] `cmd` shell) is interactive '''tab completion'''. That is, you type part of a word, press the Tab key, and the software fills in the rest of the word for you. You can do this with Tcl/Tk, and this is much easier in Tcl 8.6 with the addition of the '''tcl::[prefix]''' command.

''[[TODO: put in an actual example]]''

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