UCP (Uniform Customs and Practice for Documentary Credits): Published by the International Chamber of Commerce, this is the most frequently used standard for making payments in international trade (paying on Letters of Credit). It is most frequently referred to by its shorthand title: UCP No. 500. This revised publication reflects recent changes in the transportation and banking industries, such as electronic transfer of funds.

UFC: Abbreviation for Uniform Freight Classification.

Ullage: The space not filled with liquid in a drum or tank.

UN/EDIFACT: United Nations EDI for Administration , Commerce and Transport. EDI Standards are developed and support by the UN for electronic message (data) interchange on an international level.

Uniform Customs and Practices for Documentary Credits (UPC): Rules for letters of Credit drawn up by the Commission on Banking Technique and Practices of the International Chamber of Commerce in consultation with the banking associations of many countries.

Unit Load: Packages loaded on a pallet, in a crate or any pother way that enables them to be handled at one time as a unit.

Unit Train: A train of a specified number of railcars, perhaps 100, which remain as a unit for a designated destination or until a change in routing is made.

Unitization: The consolidation of a quantity of individual items into one large shipping unit for easier handling. Loading one or more large items of cargo onto a single piece of equipment, such as a pallet.

Unloading: Removal of a shipment from a container to a platform or warehouse.

US Consular Invoice: A document required on merchandise imported into the United States.