Stack Overflow
Q&A for professional and enthusiast programmers
Spanish Language
Q&A for linguists, teachers, students and Spanish language enthusiasts in general wanting to discuss the finer points of the language
Martial Arts
Q&A for students and teachers of all martial arts
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
Biology
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Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
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
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Italian Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Italian language
Chinese Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Puzzling
Q&A for those who create, solve, and study puzzles
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Mathematics
Q&A for people studying math at any level and professionals in related fields
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Latin Language
Q&A for linguists, teachers, and students wanting to discuss the finer points of the Latin language
Japanese Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
Bioinformatics
Q&A for researchers, developers, students, teachers, and end users interested in bioinformatics
French Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Chess
Q&A for serious players and enthusiasts of chess
Area 51
Q&A for proposing new sites in the Stack Exchange network
The Great Outdoors
Q&A for people who love being outdoors enjoying nature and wilderness, and learning about the required skills and equipment
Coffee
Q&A for people interested in all aspects of producing and consuming coffee
German Language
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Mythology & Folklore
Q&A for enthusiasts and scholars of mythology and folklore
Sports
Q&A for participants in team and individual sport activities
Open Data
Q&A for developers and researchers interested in open data