This page goes nowhere because it does not seem worthwhile to draw a lot of Bode diagrams. You can see dozens by going to Google Images and searching for "Bode", and the images link to web pages. In a nutshell, a Bode diagram shows gain and phase shift as functions of frequency. The usual axes are log of gain and phase shift on an arithmetic scale versus log of frequency.
There is some confusion about pronounciation. It is my understanding that his name rhymes with code, but most control people say Bode as if it rhymes with Cody.
(Click the triangle to hear the correct pronounciation of Bode):
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