Wikipedia
.org
The domain name org is a generic top-level domain (gTLD) of the Domain Name System (DNS) used in the Internet. The name is truncated from organization. It was one of the original domains established in 1985, and has been operated by the Public Interest Registry since 2003. The domain was originally intended for non-profit entities, but this restriction was not enforced and has been removed. The domain is commonly used by schools, open-source projects, and communities, as well as by for-profit entities. The number of registered domains in org has increased from fewer than one million in the 1990s, to ten million as of June, 2012.