This document provides definitions for various technology-related terms from A to U. It defines Apple as an electronics company that makes phones, watches, music players, iPods, and Mac computers. Bluetooth is described as a wireless connection technology used between devices like phones and cars. Clocks are defined as being installed in most electronics like phones, computers, iPods, and iPads. The document also provides brief definitions for terms like damage, electronics, flash drives, games, hacking, Instagram, jailbreaking, keyboards, links, MP3 players, and the undo function. It apologizes for not being able to cover all the letters of the alphabet.