UDID - (Unique Device Identifier) The series of numbers and letters used by Apple and developers to uniquely identify your iPhone, iPod touch, and iPad. Your UDID needs to be registered with Appleís developer program to run beta versions of iOS and needs to be included in developerís provisioning files to run Ad Hoc apps.
UTMS - Universal Mobile Telecommunications System is a 3G, transitioning to 4G networking technology.
USB - Stands for Universal Serial Bus. Is a method of connecting devices to a computer. Apple iOS devices connect via dock port to your computerís USB port.