U - from UAP to USP

UAP
Abbreviation for Unique Advertising Proposition; denotes the unique feature of a product. The 'artificial' term is the advertising field's equivalent to a USP (Unique Selling Proposition).
Unaddressed mail
Unaddressed Advertising mailings (information, promotional messages etc.) and product samples.
Undeliverables
Mail items that cannot be delivered to the named addressee at the address indicated, due to e.g. relocation or incomplete addresses.
Unfair competition
Any form of competition that involves unfair measures.
Update
The process of bringing address lists or records up to date.
URL (Uniform Resource Locator)
Technical term for an Internet address. The section before '://' refers to the requested service, e.g. 'http://' (Hypertext Transfer Protocol: transfer protocol for HTML documents). Then follows the server name (e.g. www.deutschepost.de) and often the path of the requested file, e.g. the file index and the name of the document that is requested when entering the URL. See WWW.
User
Internet user, Web surfer, (internaut, netizen, digiterati)
USP
Abbreviation for Unique Selling Proposition; refers to the features of the product that distinguish it from rival products.