1. A "personal computer" ("PC") is a digital information processing device designed for use by one person at a time. A typical PC consists of central processing components (e.g., a microprocessor and main memory) and mass data storage (such as a hard disk). A typical PC system consists of a PC, certain peripheral input/output devices (including a monitor, a keyboard, a mouse, and a printer), and an operating system. PC systems, which include desktop and laptop models, can be distinguished from more powerful, more expensive computer systems known as "servers," which are designed to provide data, services, and functionality through a digital network to multiple users.