What do the last three letters in a web address signify?
The last three letters classify what kind of web site it is. Here are some common classifications: EDU would an educational institution; COM would be a commercial site; GOV would be a government site; ORG would be a non-profit organization; and NET would be a network site, the actual ISP site. So if you just saw the address www.ccsn.nevada.edu you would know that it was an educational institution.