I discovered the same thing--I always do search before posting a question (ok, usually ...).
What I found best is, go to Documentation/Wiki or Index, and then above, on the second line down, click on Index. This, then, shows you a great number of Wiki pages, seemingly a comprehensive list, but you can skim through it easily. (For some reason, for me right now, the alphabetical list only goes through "R".)
Others probably can suggest better--this is the best I've found to-date.