- Cache is what makes sites sometimes appear to load instantly. What is actually happening is your browser stores web page information and when comparing a page revisit if the page has the same last modified date then it will simply load the cached version.

- Cascading Style Sheets are used to control site content. Using this form of control has the advantage of being able to modify an entire site by making one change to a font or layout property.

- Common Gateway Interface. CGI usually means the program that is run on the server to add dynamic actions to the Web site. Usually associated with the Perl scripting language.

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