Electrical Engineering
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Mathematics
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Stack Overflow
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Photography
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Physics
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Space Exploration
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Meta Stack Exchange
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English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Astronomy
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Computer Science
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Aviation
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Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Super User
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Ask Ubuntu
Q&A for Ubuntu users and developers
Network Engineering
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Server Fault
Q&A for system and network administrators