The generic top-level domain used by the United States federal and local government.
It was one of the original top-level domains, established in January 1985.
The U.S. is the only country that has a government-specific top-level domain in addition to its ccTLD.
Some U.S. federal agencies use .fed.us rather than .gov.
The Department of Defense and its subsidiary organizations use .mil.
Other countries typically use a second-level domain for this purpose, e.g., .gov.au for Australia, .govt.nz for New Zealand, (NZ), .gov.uk for the United Kingdom, .gc.ca for Canada, .gouv.fr for France and .guv.ro1 for Romania.
Since the United States controls the .gov TLD, it would be impossible for another country to create a domain ending in .gov, for example .jp.gov.
Some U.S. governmental entities use other domains, such as the use of .com domains by the United States Postal Service (usps.com) and the United States Army’s recruitment website (goarmy.com, this trend is repeated at the recruitment websites of the other branches of the U.S. Military).
Internet purists consider these usages to be improper, as these are governmental or military entities rather than commercial ones.