- Helper Application - This term refers to software programs that run along with browser programs enabling them to perform additional functions. Good examples are Shockwave for downloading and viewing moving images and RealAudio for hearing sounds and music online.
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- Hexadecimal color-notation system - A way of defining colors. Uses RGB scheme and associates a two digit hexadecimal number with each base color (red, green and blue).
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- Hit - Questionable measure of web site traffic. Count one hit each time a browser request is made from a web server. For example, a page containing 5 images counts 6 hits each time it is viewed (once for each image and once for the page itself). Page views are a much better way to measure traffic.
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- Home Page (or Homepage) - The opening page or main document that appears when you visit a web site, usually contains links to other web pages.
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- Host - An Internet host used to be a single machine connected to the Internet (which meant it had a unique IP address). As a host, it made available to other machines on the network certain services. However, virtual hosting has now meant that one physical host can now be actually many virtual hosts.
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- Hosting - Hosting (also known as Web site hosting, Web hosting, and Web hosting) is the business of housing, providing a server, and maintaining files for one or more Web sites.
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- HTML - Hypertext Markup Language is the authoring software language used on the Internet's World Wide Web. HTML is used for creating World Wide Web pages. See HTML tutorial.
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- HTTP - Hyper Text Transfer Protocol (HTTP), the actual communications protocol that enables Web browsing. See Protocol overview.
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- HTTPS - A TCP/IP protocol that is used by World Wide Web servers and Web browsers to transfer and display hypermedia documents securely across the Internet.
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- Hyperlink - A hypertext link; a graphic or text string which, when clicked, opens a new web page or jumps to a new location in the current page.
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- Hypertext - Text with links to other text. Documents written as hypertext contain text that when "clicked on" by the user with a mouse, links to other documents.
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