New abbreviations
The glossary a previous poster mentioned is very helpful, but I've come to learn the language here is sort of evolving continually. New abbreviations crop up often, and people use slightly different ones for the same meaning.
One that wasn't in the glossary and puzzled me for a while was OP. And then in one of those forehead-smacking moments I realized it meant Original Poster. When I run across a new one and keep seeing it, sometimes I shoot a message to the glossary address supplying it's context and at least my best guess as to what it means. Hope you do the same? It helps a site and the next newbie.
Romelle