I like to program and read about science and mathematics.
Stack Overflow
Q&A for professional and enthusiast programmers
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
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
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
User Experience
Q&A for user experience researchers and experts
Game Development
Q&A for professional and independent game developers
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Photography
Q&A for professional, enthusiast and amateur photographers
Physics
Q&A for active researchers, academics and students of physics
Server Fault
Q&A for professional system and network administrators
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Mathematics
Q&A for people studying math at any level and professionals in related fields
Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation
Chemistry
Q&A for scientists, academics, teachers and students
Personal Finance & Money
Q&A for people who want to be financially literate
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Quantitative Finance
Q&A for finance professionals and academics
German Language & Usage
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Personal Productivity
Q&A for people wanting to improve their personal productivity