Q&A for professional and enthusiast programmers
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for scientists using computers to solve scientific problems
Q&A for computer enthusiasts and power users
Q&A for Ubuntu users and developers
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Q&A for professional, enthusiast and amateur photographers