Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
Physics
Q&A for active researchers, academics and students of physics
Computer Science
Q&A for students, researchers and practitioners of computer science
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Chess
Q&A for serious players and enthusiasts of chess
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
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
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