If this area had been blank it would have been intentional.
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
English Language Learners
Q&A for speakers of other languages learning English
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Area 51
Q&A for proposing new sites in the Stack Exchange network
Drones and Model Aircraft
Q&A for experienced flyers, pilots, and builders of drones and model aircraft
Movies & TV
Q&A for movie and TV enthusiasts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Puzzling
Q&A for those who create, solve, and study puzzles
Vi and Vim
Q&A for people using the vi and Vim families of text editors
Genealogy & Family History
Q&A for expert genealogists and people interested in genealogy or family history