Stack Overflow
Stack Overflow is a privately held website, the flagship site of the Stack Exchange Network, created in 2008 by Jeff Atwood and Joel Spolsky, as a more open alternative to earlier Q&A sites such a...
Stack Overflow - Wikipedia
Stack Exchange Network
Stack Exchange is a network of question and answer websites on diverse topics in many different fields, each site covering a specific topic, where questions, answers, and users are subject to a reputa...
Ask Ubuntu
Ask Ubuntu is a community driven question and answer website for the Ubuntu operating system. It is part of the Stack Exchange Network, running the same software as Stack Overflow.Members gain reputat...
Ask Ubuntu - Wikipedia
MathOverflow
MathOverflow is an interactive mathematics website, which serves both as a collaborative blog and an online community of mathematicians. It allows users to ask questions, submit answers, and rate bo...