Penguin

URL is an Acronym for Universal Resource Locator.

A URL is a form of URI.

Most often seen in the from of HTTP URLs (!http://machine.domain.tld:80/some/random/name.html), FTP URLs (!ftp://machine.domain.tld:80/some/random/name.html) and file URLs (file://home/user/random/path/to/file.ext).