Stack Overflow
Q&A for professional and enthusiast programmers
Server Fault
Q&A for system and network administrators
Arduino
Q&A for developers of open-source hardware and software that is compatible with Arduino
Music Fans
Q&A for music historians, critics, and fans
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
DevOps
Q&A for software engineers working on automated testing, continuous delivery, service integration and monitoring, and building SDLC infrastructure