Mathematics
Q&A for people studying math at any level and professionals in related fields
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
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Quantitative Finance
Q&A for finance professionals and academics
Medical Sciences
Q&A for professionals in medical and allied health fields, students of those professions, related academics, and others with a sound understanding of medicine and healthcare-related sciences
Academia
Q&A for academics and those enrolled in higher education
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Physics
Q&A for active researchers, academics and students of physics
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Stack Overflow
Q&A for professional and enthusiast programmers
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Computer Science
Q&A for students, researchers and practitioners of computer science
English Language Learners
Q&A for speakers of other languages learning English
Literature
Q&A for scholars and enthusiasts of literature
Language Learning
Q&A for students, teachers, polyglots, and anyone interested in the techniques of second-language acquisition
Economics
Q&A for those who study, teach, research and apply economics and econometrics
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Movies & TV
Q&A for movie and TV enthusiasts
Law
Q&A for legal professionals, students, and others with experience or interest in law
User Experience
Q&A for user experience researchers and experts
Freelancing
Q&A for self-employed and freelance workers
Politics
Q&A for people interested in governments, policies, and political processes
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Personal Finance & Money
Q&A for people who want to be financially literate
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Open Data
Q&A for developers and researchers interested in open data
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills