Lesson 3 Technical Vocabulary. Translate into Spanish. Byte Is a unit of data that is eight binary digits long. A byte is the unit most computers use to represent a character such as a letter, number or typographic symbol. Each byte can hold a string of bits that need to be used in a larger unit for application purposes. Card 1. 2. Is an electronic device that connects a computer to a computer network, usually a LAN. It is considered a piece of computer hardware. A network card or a network interface card is a card that connects a computer to a network. CD-ROM A CD-ROM is a CD on which a very large amount of information can be stored and then read using a computer. CD- ROM is a on for 'compact disc read-only memory.