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This is not directly related with education, but I find it helpful for internet searches. Imagine that you find an article link, that is very precious for you but when you click it, it says "this page does not exist anymore" or something else that tell you there is no access. Then, you copy paste the link to this web site and if you are lucky you see the old page, full functional. This is useful especially when you look for old web resources. Good luck :)