Physics
Q&A for active researchers, academics and students of physics
Mathematics
Q&A for people studying math at any level and professionals in related fields
Mathematica
Q&A for users of Wolfram Mathematica
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
MathOverflow
Q&A for professional mathematicians
Stack Overflow
Q&A for professional and enthusiast programmers
User Experience
Q&A for user experience researchers and experts
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Academia
Q&A for academics and those enrolled in higher education
Biology
Q&A for biology researchers, academics, and students
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Law
Q&A for legal professionals, students, and others with experience or interest in law
Server Fault
Q&A for system and network administrators
WordPress Development
Q&A for WordPress developers and administrators
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
History
Q&A for historians and history buffs