Programmers
Q&A for professional programmers interested in conceptual questions about software development
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
User Experience
Q&A for user experience researchers and experts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Mathematics
Q&A for people studying math at any level and professionals in related fields
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Server Fault
Q&A for professional system and network administrators
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Ask Patents
Q&A for people interested in improving and participating in the patent system
Computer Science
Q&A for students, researchers and practitioners of computer science
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
