Long-term MVS/OS390/zOS sysprog. Assembler, REXX programming. Learning Java & Objective-C.
Photography & picture framing.
Q&A for professional and enthusiast programmers
Q&A for professional mathematicians
Q&A for professional, enthusiast and amateur photographers
Q&A for professional and independent game developers
Q&A for active researchers, academics and students of physics
Q&A for professional programmers interested in conceptual questions about software development
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for people studying math at any level and professionals in related fields
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings