About Stack Exchange

Stack Exchange is a network of question and answer websites, each focused on a particular subject. The sites share a common model in which members ask questions, others answer, and community voting and reputation decide which answers are most useful.

Topics range from programming and system administration to subjects outside technology, with each site run by its own community and moderators. Stack Overflow is the best-known member of the network, and the sites together form a large, searchable collection of curated answers.

Stack Exchange is a hosted community network that is free to read and participate in. The vendor homepage could not be fetched when this entry was prepared, so the description is based on general knowledge of the service.