Internet: The Internet. What is it, really? Well, it's really just a world-wide network of computers, that makes it possible to pass information from one computer to another. Suppose you ran a cable from your computer to your neighbor's. And then your neighbor ran a cable from there to the next neighbor. You could send stuff to neighbor A, and vice versa, and you could also send stuff to neighbor B: anything you sent that was destined for B would simply be relayed by A. Now, multiply that a few million times, and you've got the Internet! People send lots of things over the Internet: email, pictures, text, files, information, etc.
Web: The World Wide Web, or simply the Web, is in essence a bunch of linked documents, or "pages" that exist on the Internet. A Web page can be simple black-and-white text, or have pictures, graphics, sound and more. When you point to a word or a picture on a Web page and click, and it brings up another page, that's a link. The page might be related to the page you were just looking at, or it might be something completely different. That page can then have links to other pages, and so on. This system of page linked to page linked to page gives the impression of a web, hence the name. The terms Internet and Web are sometimes used interchangeably, but really that is incorrect.
Web Site: A set of Web pages that go together, generally belonging to one company, person or organization.
Domain Name: Every computer that's connected to the Internet has a unique, numeric address. Here's what one looks like: 206.124.64.253. It's called an IP (Internet Protocol) number. Don't worry – you don't have to know any of them. People generally prefer to remember words and names rather than numbers, so a system has been developed to assign names to these numbers. These are called domain names. Domain names have levels – top level, second level, and so on. There are several top-level domain names; the most common are com, net and org. When you see a domain name like pepsi.com, "com" is the top-level domain (TLD) and "pepsi" is the second-level domain (SLD). Pepsi, having registered this domain name as its own, could then, if it chose, assign lower-level domain names, for example: freestuff.pepsi.com. A common third-level domain is www (for World Wide Web), for example www.pepsi.com, but it isn't always used.
Byte: A piece of data in a computer. A byte can hold one letter or other character, or a numerical value, or an instruction for the computer.
HTML: OK, hold on to your hat: HTML stands for "Hypertext Markup Language". Wait! Come back! It's really not that bad. The system of clicking on a link on a Web page and thus going to a different page is called Hypertext. That's all there is to that part of it! Now, in order to have something more than plain, flat black-and-white text, you "mark up" the text. For example if I want a word to be underlined, I just do this: <U>underlined</U>. That <U> and </U> thing are called "tags". All the different tags there are make up a computer language: the Hypertext Markup Language. Easy!
MB: An abbreviation for Megabyte, which is one million bytes (Mega = Million). As an example, this web site takes up approximately 330,000 bytes, or .33MB: one third of a Megabyte.
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