Uniform Resource Locator is a specific type of [Uniform Resource Identifier]
A URL specifies the location of a resource on a computer network and is a mechanism to retrieve said resource.
Usuaully references web pages, but also used for FTP, email, database access, and others.
History
Defined in RFC.
URL combines the Domain Names with file path syntax.
Syntax
HTTP URLs conform to the syntax of a generic URI.