To computerize means to convert a system, process, or set of records from manual methods to computer-based operation. When a library computerizes its catalog, it transfers information from physical card files into a digital database that people can search on screens. When a factory computerizes its assembly line, it may use robots and computer-controlled machines to handle repetitive tasks.

Before computers became common, people kept records in filing cabinets, calculated numbers with pencils and adding machines, and typed letters on typewriters. Computerizing these tasks meant teaching computers to do them instead: storing files digitally, performing calculations instantly, and processing words on screens. A small business might computerize its accounting by switching from paper ledgers to spreadsheet software.

As more systems became computerized, it revolutionized how people work. Schools computerized attendance tracking, hospitals computerized patient records, and stores computerized their inventory. Each change made tasks faster and more accurate, though it also required people to learn new skills. When something becomes computerized, it usually means less paper, fewer filing cabinets, and more screens.