The Census Bureau explains their definitions for urban areas on this page.

Here is a set of guidelines for appropriating footage and publishing the product online.

I find pdfs maddening, but I suppose graphic designers trained in print prefer the format.

I don't know enough about this topic to evaluate the quality of this history, presumably written for undergrads, but it's definitely a good source of images for teaching.

This online reference takes rules from a typography manual and describes how to implement them in CSS.

This is kind of interesting, but the center column flows over in my browser.

The Office of National Drug Control Policy has a glossary of street names for street drugs. I'm reminded of an Ali G episode where he interviews a DEA officer.

A brief glossary from Adobe detailing typographic jargon.