22-letter words containing p, u, t, r
- universal postal union — an international organization, formed in Bern, Switzerland (1875), that administers and regulates international postal service. Abbreviation: UPU.
- universal product code — a bar code that indicates price, product classification, etc., and can be read electronically, as at checkout counters in supermarkets. Abbreviation: UPC.
- unprofessional conduct — activity that is contrary to the accepted code of conduct of a profession
- unsaturated production — Unsaturated production is the production of smaller, unsaturated hydrocarbons from saturated hydrocarbons, for example producing alkenes such as ethane and propene.
- upright vacuum cleaner — a vacuum cleaner that is tall rather than wide
- urban development zone — an area that is designated as being a site for urban development
- user datagram protocol — (protocol) (UDP) Internet standard network layer, transport layer and session layer protocols which provide simple but unreliable datagram services. UDP is defined in STD 6, RFC 768. It adds a checksum and additional process-to-process addressing information [to what?]. UDP is a connectionless protocol which, like TCP, is layered on top of IP. UDP neither guarantees delivery nor does it require a connection. As a result it is lightweight and efficient, but all error processing and retransmission must be taken care of by the application program.
- white australia policy — an unofficial term for an immigration policy designed to restrict the entry of non-White people into Australia
- zero population growth — the maintenance of a population at a constant level by limiting the number of live births to that needed to replace the existing population.