Updating the Glossary

I maintain a blog Glossary page which is supposed to be a handy reference for newcomers to the blog. It is necessary because I am lazy and often use shorthand when I am writing blog posts. My commenters frequently do as well. I was just adding RAP to the list when I thought I should maybe solicit feedback from you.

So, any suggestions for the Glossary, Dear Reader?

Anything which stumped you when you first started reading? Or which stumps you now?

What jargon should I add?