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
Mathematics
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Super User
Q&A for computer enthusiasts and power users
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Bioinformatics
Q&A for researchers, developers, students, teachers, and end users interested in bioinformatics
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
DevOps
Q&A for software engineers working on automated testing, continuous delivery, service integration and monitoring, and building SDLC infrastructure
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field