Naming Conventions

[Craig Parker]

This may be nit-picky, but I'm thinking it might be important down the 
road as docs get a makeover. What are these areas officially called that 
I've numbered in the screenshot? There looks to be an equivalent in 
whatever theme I'm using.

1. Menu
2. Sub menu? (flies out in one theme)
3. Links area?
4. Work area?