tkvars is a manual page for Tk. See http://www.tcl.tk/man/tcl8.4/TkCmd/tkvars.htm for details. Tkvars describes Tcl variables that are used or set by Tk. These are (for Tk 8.4):
   * [tk_library]
   * [tk_patchLevel]
   * [tk::Priv]
   * [tk_strictMotif]
   * [tk_textRedraw]
   * [tk_textRelayout]
   * [tk_version]

If the wish shell was called with the '-geometry' option, there will also be a variable 'geometry' defined, and then contains the value given to the '-geometry' option on the command line.

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