I'm a self-teaching geek. teaching because that process is far from over. I don't know a ton, but what I know, I'll share, and I won't answer a question if I'm not confident I'm correct.
Bicycles ♦
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Stack Overflow
Q&A for professional and enthusiast programmers
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Mathematics
Q&A for people studying math at any level and professionals in related fields
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Physics
Q&A for active researchers, academics and students of physics
User Experience
Q&A for user experience researchers and experts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
WordPress Answers
Q&A for WordPress developers and administrators
Photography
Q&A for professional, enthusiast and amateur photographers
Server Fault
Q&A for professional system and network administrators
Game Development
Q&A for professional and independent game developers
Ask Different
Q&A for power users of Apple hardware and software
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
