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These definitions are for people like you and I who just want to know how the internet effects us as normal people. We are not trying to re-explain the internet in all of its massive complexity! These are nice simple explanations that anyone can hopefully understand which is going to make it possible to not have your eyes glaze over when contemplating a new website, an upgrade, some search engine marketing, search engine optimisation etc etc.
Website Addresses
A website address is a bunch of letters that allows you to find a webpage. It is the bit of info you type into the address bar of your web browser. Examples of website addresses are www.google.com, www.websitesneversleep.com and a billion more. How these website addresses are given out, kept track of and generally organised is quite a task when you consider how many there are and all of the languages in all the different countries. The good thing about the internet is though that it is just a bunch of computers and only speaks one language ! This language (and you're going to need to forget this) is called the TCP / IP suite of protocols (a bunch of rules for computors to talk to each other with). But that's not important, the real trick about the internet address system is that it all boils down to one question. When you type an address into a browser address bar, how on earth can your computer find that page ?
Now this web page we are after is on a computer somewhere and computers don't have names like "websitesneversleep", they have very unhelpful numbers like 129.168.1.234. Well here is a problem straight away. If my compulter is looking for a webpage called www.websitesneversleep.com but it's on a computer called 129.168.1.234, we straight away have a problem. If my computer just keeps sending out requests for www.websitesneversleep.com, trust me know one will answer. Unless ! Yes help is at hand. Enter the Domain Name System (DNS). The domain system is a bunch of very helpful computers who sit around with very long lists and names and numbers. For every website name it has a matching web page serving computer's numbers. These DNS servers have nothing better to do than sit around and listen for computers like yours and mine, asking for websites by name. As soon as they pick up this request, they match it to the correct number and send the request happily on i's way to the waiting web page serving computer.

Web Servers
You have now made the web servers day. All it does it wait and hope someone (via a computer) will ask for a web page and you have done it ! Flinging itself into action it hurls back the page you have asked for, rushing to you.
Sub Domain
This is simple and is quite like it sounds. www.websitesneversleep.com is a domain www.aspecialbit.websiteneversleep.com is a sub domain. The aspecialbit between the full stops could be anything but it just creates a way to seperate sections of your domain.
Domain Registration
Is the process of registering your domain. We can do all of that for you.
Domain registrant (usually also the domain owner)
Is the person or entity that registers the domain and their contact details are attached to the domain.
A Web Browser
This is the computer program that is used to look at web pages. The big examples are Internet Explorer, Firefox, Google's Chrome, Apples Safari and there actually quite a few more. Here is a sample from Wikipedia
Yes there are lots, although most people use Internet Explorer, Mozilla Firefox, Google Chrome, Apples Safari and one or two more. It is important that when your website is designed, that it looks good in as many browsers as possible. When contracting a web designer, make sure you ask them that question.
1991 WorldWideWeb (Nexus) 1992 ViolaWWW, Erwise, MidasWWW, MacWWW (Samba) 1993 Mosaic, Cello[2], Lynx 2.0, Arena, AMosaic 1.0 1994 IBM WebExplorer, Netscape Navigator, SlipKnot 1.0, MacWeb, IBrowse, Agora (Argo), Minuet 1995 Internet Explorer 1, Netscape Navigator 2.0, OmniWeb, UdiWWW[3], WebRouser[4], Internet Explorer 2, Grail 16 1996 Arachne 1.0, Internet Explorer 3.0, Netscape Navigator 3.0, Opera 2.0, PowerBrowser 1.5[5], Cyberdog, Amaya 0.9[6], AWeb, Voyager 36 1997 Internet Explorer 4.0, Netscape Navigator 4.0, Netscape Communicator 4.0, Opera 3.0[7], Amaya 1.0[6] 70 1998 Internet Explorer 5.0 Beta 1, iCab, Mozilla 147 1999 Amaya 2.0[6], Mozilla M3, Internet Explorer 5.0 248 2000 Konqueror, Netscape 6, Opera 4[8], Opera 5[9], K-Meleon 0.2, Amaya 3.0[6], Amaya 4.0[6] 361 2001 Internet Explorer 6, Galeon 1.0, Opera 6[10], Amaya 5.0[6] 513 2002 Netscape 7, Mozilla 1.0, Phoenix 0.1, Links 2.0, Amaya 6.0[6], Amaya 7.0[6] 587 2003 Opera 7[11], Safari 1.0, Epiphany 1.0, Amaya 8.0[6] 719 2004 Firefox 1.0, Netscape Browser, OmniWeb 5.0 817 2005 Safari 2.0, Netscape Browser 8.0, Opera 8.[12], Epiphany1.8, Amaya 9.0[6], AOL Explorer1.0, Maxthon 1.0, Shiira 1.0 1018 2006 SeaMonkey 1.0, K-Meleon 1.0, Galeon 2.0, Camino 1.0, Firefox 2.0, Avant 11, iCab 3, Opera 9[13], Internet Explorer 7, Sputnik 1093 2007 Maxthon 2.0, Netscape Navigator 9, NetSurf 1.0, Flock 1.0, Safari 3.0, Conkeror 1262 2008 Konqueror 4, Safari 3.1, Opera 9.5[14], Firefox 3, Amaya 10.0[6], Flock 2, Chrome 1, Amaya 11.0[6] 1565 2009 Internet Explorer 8, Chrome 2, Safari 4, Opera 10[15], Chrome 3, SeaMonkey 2, Camino 2, Firefox 3.5 1734 2010 Firefox 3.6, Chrome 4, Opera 10.50[16], Chrome 5, Safari 5
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