Have you ever seen a computer back in 1960's, well they dont look like like the ones use use today. The first computers look like this. Now back then hey didnt have internet like we have it now. For an example, in the 1960's when they had aol and others sites, if you have an aol email you cant write to anyone elsewith a different site acount. years went by an they started to build links and now becaus we have so many links we can write to anybody with a different site.