Stack Overflow
Q&A for professional and enthusiast programmers
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Q&A for meta-discussion of the Stack Exchange family of Q&A websites
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Q&A for people interested in improving and participating in the patent system
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Q&A for people wanting to improve their personal productivity
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Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Ask Different
Q&A for power users of Apple hardware and software
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Q&A for apps, scripts, and development with the Stack Exchange API
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Q&A for power users of web applications
Server Fault
Q&A for professional system and network administrators
Arqade
Q&A for passionate videogamers on all platforms
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Q&A for enthusiasts and power users of the Android operating system
Programmers
Q&A for professional programmers interested in conceptual questions about software development
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The Workplace
Q&A for members of the workforce navigating the professional setting
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
