I released a new section today based on a LibreOffice Writer file that I have been maintaining ever since I started getting serious about photography. The photo glossary is full of the types of terms that I refer back to frequently. I don't necessarily understand them, but I find that a basic understanding helps me ask better questions and forumulate better searches on google.
Exactly what it sounds like, the glossary of photography terms contains a list of terms and their definitions. In my experience, these terms are conversationally helpful and knowing them makes a lot of other things make more sense.