Interested in programming languages and systems reliability. Used to do security engineering and web standards.
Stack Overflow
Q&A for professional and enthusiast programmers
Information Security
Q&A for information security professionals
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Computer Science
Q&A for students, researchers and practitioners of computer science
Programming Language Design and Implementation
Q&A for designers and implementers of computer programming languages
Code Review
Q&A for peer programmer code reviews
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Ask Ubuntu
Q&A for Ubuntu users and developers
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Super User
Q&A for computer enthusiasts and power users
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Ask Different
Q&A for power users of Apple hardware and software
Server Fault
Q&A for system and network administrators
Mathematics
Q&A for people studying math at any level and professionals in related fields
Emacs
Q&A for those using, extending or developing Emacs
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
English Language Learners
Q&A for speakers of other languages learning English
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
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
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems