The comic strip was called "Locomotives". Written by grad student Bob Peterson.
"It may say everything that you need to know about this comic strip that Bob Peterson is now an academy award nominated screenwriter at Pixar - of course, aren't all Purdue mechanical engineering grads? If you were at Purdue in the 80's, you don't need me to tell you that this was the main reason to pick up the Exponent for 2 years. I can't suggest anyone who wasn't there during that time will get much of the humor, since it is very topical, but this remains one of the funniest comics ever produced. Ok, maybe Calvin and Hobbes was better, but Bill Watterson was getting paid and wasn't working on a thesis at the time."
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https://en.wikipedia.org/wiki/Bob_Peterson_(filmmaker)
also: do a google search on the following for the amazon feature quoted above:
Boilercoaster-84-86-exponents-motives-cartoon