Physics
Q&A for active researchers, academics and students of physics
Chess
Q&A for serious players and enthusiasts of chess
Mathematics
Q&A for people studying math at any level and professionals in related fields
MathOverflow
Q&A for professional mathematicians
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 Educators
Q&A for those involved in the field of teaching mathematics
Computational Science
Q&A for scientists using computers to solve scientific problems
Puzzling
Q&A for those who create, solve, and study puzzles
Mathematica
Q&A for users of Wolfram Mathematica
Quantum Computing
Q&A for engineers, scientists, programmers, and computing professionals interested in quantum computing
Information Security
Q&A for information security professionals
French Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Computer Science
Q&A for students, researchers and practitioners of computer science
Ask Different
Q&A for power users of Apple hardware and software
Pets
Q&A for pet owners, caretakers, breeders, veterinarians, and trainers
Arqade
Q&A for passionate videogamers on all platforms
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Academia
Q&A for academics and those enrolled in higher education
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
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
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts