The sole holder of the gold [floating-point] badge, and the first man to earn the silver [assembly] badge.
Assembly programmer, mathematician, micro-optimization and micro-architecture specialist.
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Photography
Q&A for professional, enthusiast and amateur photographers
Mathematics
Q&A for people studying math at any level and professionals in related fields
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Physics
Q&A for active researchers, academics and students of physics
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Computational Science
Q&A for scientists using computers to solve scientific problems
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing