The uplink is a term used in radio communications and satellite communications to denote the link from the end-user to the network or from the earth to the satellite.

User Datagram Protocol (UDP) a connectionless transport-layer protocol. It provides an unreliable datagram connection between applications.

The Universal Mobile Telecommunications System (UMTS) is one of the third generation (3G) mobile telecommunications systems.

The Unstructured Supplementary Service Data, or USSD Code service that banks and other financial service providers use to service the banking community from their platforms.