Advanced Beginner learning how to program. Mostly Ruby, Ruby on Rails, some Linux.
Q&A for professional and enthusiast programmers
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for Ubuntu users and developers
Q&A for computer enthusiasts and power users
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for professional system and network administrators
Q&A for power users of Apple hardware and software