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This.com and That.com

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Browser Basics: This.com and That.com

What is "this dot com" and "that dot com" all about?

As you have already learned, the `dot' is a way of expressing the period key on your keyboard. It is used as a seperator between something like `this' and `com'. But what is `com' and why do so many addresses (URLs) have it? ``.com'' (.com) signifies that the site is a commercial site. Many many sites on the internet have been setup as commercial sites, so it's little wonder that you see it so often.

It happens that there is just more than .com domains, too. URLs may end in .org, .com, .net, .edu, .mil, .int, .<countrycode> . More info on domains and the internet can be found in Chapter 1.4, The Domain Name System.

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