C-G-I stands for Common Gateway Interface, a type of programming language for Web pages that works with the standard H-T-M-L language to enable websites to do various things. Often, when a Web page has moved to a new location, you'll find a page announcing the move, then automatically redirecting you to the new location. That's done with C-G-I. When you fill out a form on the Internet and send it in, C-G-I is the programming language that performs this operation. It's used to create pull-down menus that can redirect visitors to different sites or to keep track of the number of days left in the countdown to a given event. It can even be used to select a random image to display, so visitors to your site won't see the same thing each time. If you're building a website and want to incorporate one or more of these special C-G-I features into it, you can find the programs already written and freely available on the Web. Just copy the instructions into your page's H-T-M-L code and you've added an exciting new feature to your website.
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