Note From JWR:

A gent e-mailed to ask me why I put so many acronyms and terms in my blog glossary--including "ones like AC, DC, AM, FM, and GPS. Those are obvious to anyone." The reason is that there are SurvivalBlog readers all over the planet, some of whom have learned English as a second language. They don't all share the American penchant for acronyms. Sorry if this overkill makes glossary seem too voluminous or if it appears that I link acronyms excessively to the glossary.