Stack Overflow
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Physics
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TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
The Workplace
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Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Super User
Q&A for computer enthusiasts and power users
Mathematics
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