Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Academia
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Computer Science
Q&A for students, researchers and practitioners of computer science
Game Development
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Physics
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Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Computer Graphics
Q&A for computer graphics researchers and programmers
Artificial Intelligence
Q&A for people interested in conceptual questions about life and challenges in a world where "cognitive" functions can be mimicked in purely digital environment