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(Country Code Top Level Domain) -- Every country (and a few territories) in the world has a reserved, two letter country code domain that is theirs to use as they see fit. Some countries run their own ccTLD registry, others outsource it to a private company, and still others sell rights to their ccTLD to third parties to run as they see fit.
Examples of ccTLDs are .ca (Canada), .us (United States), and .to (Tonga). In general, these are registered by businesses with a coincidental link to the TLD in question.
For example: .to is used more by Torontonians than Tongans and .tv has more American television content than native Tuvalu culture.
(Common Gateway Interface) -- A set of rules that describe how a Web Server communicates with another piece of software on the same machine, and how the other piece of software (the `CGI program`) talks to the web server. Any piece of software can be a CGI program if it handles input and output according to the CGI standard. Usually a CGI program is a small program that takes data from a web server and does something with it, like putting the content of a form into an e-mail message, or turning the data into a database query.
A hosting service that simply stores and maintains a customer's server.
The most common meaning of `Cookie` on the Internet refers to a piece of information sent by a Web Server to a Web Browser that the Browser software is expected to save and to send back to the Server whenever the browser makes additional requests from the Server. Depending on the type of Cookie used, and the Browser`s settings, the Browser may accept or not accept the Cookie, and may save the Cookie for either a short time or a long time. Cookies might contain information such as login or registration information, online `shopping cart` information, user preferences, etc. When a Server receives a request from a Browser that includes a Cookie, the Server is able to use the information stored in the Cookie. For example, the Server might customize what is sent back to the user, or keep a log of particular user`s requests.