The term 'Computer Data Unit' can be abbreviated to the 4-letter word 'BYTE'. A byte is a unit of digital information in computing and telecommunications that usually consists of eight bits. It is the basic unit of measurement used to quantify computer memory and storage capacity. A byte can represent a single character, such as a letter, number, or symbol, or it can represent a small group of bits that encode a larger unit of data, such as a word or phrase. Bytes are also used to measure the speed of data transmission over a network.