14-Sep-2017: I'm a newcomer to TCL examining it as a possible platform for internal engineering tools.

The jury is still out.  More later.

11-Oct-2017:  The jury is in and despite first appearances, TCL has a large collection of tools, packages,
information, and resources that makes it a great fit for engineering tools for industrial control (and probably many other fields as well).
 
   * High level, stable language that's readable even when you didn't write the code.
   * Single file executables that require no install.
   * Command line and easily constructed GUI interfaces.
   * Packages for integration with Windows and Excel.
   * Existing packages to cover just about every aspect of engineering project work.
   * A full set of development, debugging, testing, and documentation tools.
   * A single, information packed wiki that captures years of experience with multiple approaches to solving the same problems. 

[APN] Glad to have you aboard! I think Tcl's ease of integration with C also plays a part in it being used in commercial CAD tools, HyperMesh etc.

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