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Here is a Tip to help you search for specific web sites : Google search tip 2
It is common knowledge that many web addresses end with .com. However, there are tons of other web sites that end with other domains, such as .ca(Canada), .co.uk(UK), .co.jp(Japan), .edu(educational institutions), .info(informational sites), and .gov(governmental sites), etc. In order to find a specific domain you just need to type: site: after the keyword(s) you want to search. If you want to search for all sites excluding the sites that end with .edu you just need to type: -site:edu after your keyword(s).
