（三）To open and transfer files, display text and image, you must use browser such as Microsoft’s Internet Explorer or Netscape’s Navigator. Browsers are programs that provide access to Web resources. For browsers to connect to other resources, the location or address must be specified. These addresses are called uniform resources locators (URL). Once the browser has connected to a Web site, a document file is sent to your computer. This document contains Hypertext Markup Language (HTML) commands. The browser interprets the HTML commands and displays the document as a web page.
Typically, the first page of a Web site is referred to as its home page. The home page presents information about the site along with references and hyperlinks, or connections to other documents that contain related information-text files, graphic images, audio, and video clips. These documents may be located on a nearby computer system or on one halfway around the world. The references appear as underlined and colored text and/or images on a Web page. To access the referenced material, all you do is click on the highlighted text or image. A link is automatically made to the computer containing the material, and the referenced material appears.