You are looking at a very old, but free version of the course.
If you are interesed the most recent version, check it out
on the Perl Maven site.
Provides a way to describe user behaviour in a command line environment
Can send information as if it was typed in the keyboard
Can wait for some Expect-ed value and based on this value do something
Originally an extension of Tcl
Ported to Perl
Can be used in environments such as:
Command line application like bc
Telnet to another box and type in things
Anything usually a person would do on the command line.
If you are interested in on-site trainings by the author, please
contact me directly.