URL: see Uniform Resource Locator.
Uniform Resource Locator (URL): The address that defines the route to a file on the Web or any other Internet facility. The URL contains the protocol prefix, port number, domain name, subdirectory names, and file name.
Upgrade: A software patch that replaces existing software with a newer version.
User: A person who has an account or a user name on a domain, for example, Bob234.