Stack Overflow
Q&A for professional and enthusiast programmers
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Super User
Q&A for computer enthusiasts and power users
Mathematica
Q&A for users of Wolfram Mathematica
Server Fault
Q&A for system and network administrators
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Tridion
Q&A for Tridion developers and administrators
Ask Different
Q&A for power users of Apple hardware and software
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Computer Science
Q&A for students, researchers and practitioners of computer science
User Experience
Q&A for user experience researchers and experts
Physics
Q&A for active researchers, academics and students of physics
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Hardware Recommendations
Q&A for people seeking specific hardware recommendations