At 23, I enjoy life, throw caution to the wind, dream of sky diving and love to code.
Physics
Q&A for active researchers, academics and students of physics
Stack Overflow
Q&A for professional and enthusiast programmers
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Area 51
Q&A for proposing new sites in the Stack Exchange network
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Super User
Q&A for computer enthusiasts and power users
Ask Ubuntu
Q&A for Ubuntu users and developers