.edu | Educational organization (most US universities) |
.k12 | US school site (not all US schools use this) |
.ac | Academic institution (outside of US) |
.sch | School site (some schools outside of the US use this) |
.com | Company (usually .co in the UK) |
.org | Any organization |
.gov | Government agency |
.net | Network |
.mil | Military institution |
.biz | Commercial purpose / business |
.info | Commercial purpose / business |
.uk | United Kingdom (country specific extension) |
.jp | Japan (country specific extension) |
.ca | Canada (country specific extension) |
.au | Australia (country specific extension) |
(~) Sometimes you might see a “user” reference or tilde (~) symbol in a sub directory, followed by a name. This indicates that you may be on a personal Web page that is being hosted by an ISP (Internet Service Provider).