Personal computer, often called a PC, is a computer used by one person at a time. PC’s include all the major components of larger computers: microprocessors, memory chips, input devices, storage devices, and output devices. See the article Computer for a description of these components. Unlike larger computers, PC’s are designed to fit on or under a desktop, or even on the user’s lap.
PC’s can perform a variety of functions because they are programmable, which means they follow the instructions given to them. These instructions are known as software. Some of the most common software packages include word-processing programs, financial programs, games software, database management programs, and desktop publishing programs.
Businesses use PC’s to perform tasks more quickly, efficiently, and accurately than unaided workers can. Large and middle-sized businesses often link PC’s to form a computer network, enabling users to share files (bodies of processed information). People use PC’s at home to help with personal business matters, such as maintaining financial records or preparing taxes; for entertainment, such as playing video games; and for communication and information, such as sending and receiving e-mail or using the Internet.
Small, battery-powered, portable PC’s enable people to use a computer away from a desk. Such portables include laptop computers, which can be held on the lap, and notebook computers, which are about the size of a loose-leaf notebook. These devices have the same computing power as desktop PC’s.
