TCL Expect - sgml/signature GitHub Wiki

http://blog.robertelder.org/don-libes-expect-unix-automation-tool/

http://www.esrf.eu/computing/bliss/tcltk/expect/90min-intro-talk.pdf

http://www.gtk-server.org/docs.html

https://softpanorama.org/Scripting/tcl.shtml

https://www.nist.gov/publications/how-avoid-learning-expect-or-automating-automating-interactive-programs