Mathematics
Q&A for people studying math at any level and professionals in related fields
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Proof Assistants
Q&A for mathematicians and computer scientists who develop and use proof assistants
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Open Source
Q&A for people organizing, marketing or licensing open source development projects
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Academia
Q&A for academics and those enrolled in higher education
Stack Overflow
Q&A for professional and enthusiast programmers
Information Security
Q&A for information security professionals
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Emacs
Q&A for those using, extending or developing Emacs
Mathematica
Q&A for users of Wolfram Mathematica
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Super User
Q&A for computer enthusiasts and power users
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Video Production
Q&A for engineers, producers, editors and enthusiasts spanning the fields of video and media creation
Server Fault
Q&A for system and network administrators
Quantum Computing
Q&A for engineers, scientists, programmers, and computing professionals interested in quantum computing
Retrocomputing
Q&A for vintage-computer hobbyists interested in restoring, preserving, and using the classic computer and gaming systems of yesteryear
Mathematics Educators
Q&A for those involved in the field of teaching mathematics
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts