I spent several thousand words in the book talking about mental models and archetypes, but this awesome satirical graphic conveys the essence of the idea in just one picture. From the Global Nerdy blog, though it apparently has a longer history and originally appeared in French first. Thanks to Jean-Luc Delatre for pointing this out.
About Tempo
Here’s another one but with QA tacked on – https://lh3.googleusercontent.com/-gRXpwT6i1ho/TkL8Hq3vd8I/AAAAAAAAiEI/WqeegTl_0mU/TechSeenByTech.png
Also I’ve seen this similar one on project management a number of times — http://4.bp.blogspot.com/_dadkSDOYSMo/RyMvduPsV-I/AAAAAAAAAAU/kKSgZEOyiiQ/s1600-h/Project+Management+Illustrated+with+a+Tree+and+a+Swing.jpg
More —
iPhone vs Android vs Blackberry
http://www.csectioncomics.com/2010/11/iphone-vs-android-vs-blackberry.html
Mac vs Windows vs Linux
http://www.failepicfail.com/epic-fail/1111/-epic-fail-1320193240.jpg