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Technology Chapter 23: Computer and Internet Communication—Terms and Definitions Backbones: fiber-optic communication lines built by large communications companies to connect regions in their systems. Browser: a software program that acts as an interface between a user and the World Wide Web. Central processing unit: the heart of a computer. Dedicated access: a system in which a subscriber’s computer is directly connected to the Internet at all times. Dial-up access: a system in which computers are connected to the Internet through a modem. Domain name: the address of a site on the Internet. Electronic commerce: a type of commerce involving selling products and services over the Internet. External storage devices: devices on which data can be stored outside the basic computer circuitry. Hyperlinks: connections between one web page and other pages and web sites through urls. Hypertext markup language: a type of coding that tells a receiving computer how a page should look. Input devices: devices that allow an operator to enter data into a computer’s operating system. Internet: interconnected networks of computers that share information. Internet access: the way a computer is connected to the Internet. Internet protocol address: the identifying number assigned to each computer connected to the Internet. Internet service provider: a company that forms a network into which home computers are connected. Links: connections between one web page and other pages and web sites through urls. Local area network: a system used in a single building or site to connect several personal computers or workstations to a central server. Memory: a major part of a computer where data and operating instructions are stored. Network access points: points that allow a customer of one company to connect with a customer of another company. Networks: connections through which computers can communicate with other computers. Output devices: devices on which data can be viewed. Page: a text file someone creates to share information or ideas. Point of presence: a connection point that lets local users access a company’s network. Random-access memory: memory that can be read or changed by both the computer and the user. Copyright Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only. Read-only memory: memory that can be read by the computer, but cannot be changed. Routers: specialized computers that determine how to send information from one computer to another. Search engines: special sites on the Internet that operate on the principle of key words. Server: a special computer used to store programs and data for a network. Uniform resource locator: a code that is a method of naming documents or sites on the World Wide Web. Wide area network: a type of computer network that covers large geographic areas. World wide web: a computer-based network of information resources. Copyright Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only.