Mathematics
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Physics
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Chemistry
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Mathematics Educators
Q&A for those involved in the field of teaching mathematics
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Biology
Q&A for biology researchers, academics, and students
Stack Overflow
Q&A for professional and enthusiast programmers
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
English Language Learners
Q&A for speakers of other languages learning English
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Electrical Engineering
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Engineering
Q&A for professionals and students of engineering
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills