The domain name gov is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet. The name is derived from the word government, indicating its restricted use by government entities. The gov domain is administered by the General Services Administration (GSA), an independent agency of the United States federal government. The U.S. is the only country that has a government-specific top-level domain in addition to its country-code top-level domain. This is a result of the origins of the Internet as a U.S. federal government-sponsored research network. Other countries typically delegate a second-level domain for this purpose; for example, .gc.ca is the second-level domain for the Government of Canada and all subdomains. Some U.S. government-related websites use com, or org instead of gov, such the United States Postal Service (usps.com), various recruiting websites for armed services (e.g., goarmy.com), and the websites for many US cities (e.g., cityofchicago.org). The Department of Defense and its subsidiary organizations use the mil sTLD instead of .gov. All governments in the U.S. were allowed to apply for delegations in gov after May 2012. For example, domains have been registered for the city of Atlanta (atlantaga.gov), for the county of Loudoun, Virginia (loudoun.gov), and for the U.S. state of Georgia (georgia.gov). This was not always possible; under an earlier policy, only federal agencies were allowed to use the domain, and agencies below cabinet level were required to use subdomains of their parent agency. Inconsistencies exist in addressing of state and local government sites, with some using gov, some us, some using both. Pennsylvania uses www.pa.gov, www.pennsylvania.gov and www.state.pa.us for the same web site, and still others in com, org or other TLDs.
The vertical bar ( | ) is a computer character and glyph with various uses in mathematics, computing, and typography. It has many names, often related to particular meanings: Sheffer stroke (in logic), verti-bar, vbar, stick, vertical line, vertical slash, bar, pike, or pipe, and several variants on these names. It is occasionally considered an allograph of broken bar (see below).