Graduate, Computer architecture, Compiler, Operating System, Algorithms especially Parallel Algorithms and Computing, Languages, Hack.
Q&A for professional and enthusiast programmers
Q&A for computer enthusiasts and power users
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for people studying math at any level and professionals in related fields