HTTP

 One of the Internet founders Sir Tim Berners-Lee in an interview for the New York Times said that he regrets addition of slash characters to the web's URL address system. He stated that the use of slash characters in the URL was not compulsory and made the web addresses needlessly longer than they could be.

According to Berners-Lee the protocol names such as HTTP or FTP should be separated from the rest of the address but lately it turned out that only the colon was necessary.