Stack Overflow
Q&A for professional and enthusiast programmers
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
The Workplace
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Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Bicycles
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Japanese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
Personal Finance & Money
Q&A for people who want to be financially literate
Physics
Q&A for active researchers, academics and students of physics
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Personal Productivity
Q&A for people wanting to improve their personal productivity
Signal Processing
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Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Computational Science
Q&A for scientists using computers to solve scientific problems
Mathematics
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Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
Theoretical Computer Science
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Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Programmers
Q&A for professional programmers interested in conceptual questions about software development
