BBC.The forward slashes at the beginning of internet addresses have long annoyed net users and now the man behind them has apologised for using them.
Sir Tim Berners-Lee, the creator of the World Wide Web, admitted that the // in a web address were "unnecessary".
He told the Times newspaper that he could easily have designed URLs not to have the forward slashes.
"There you go, it seemed like a good idea at the time," he told the newspaper.
He said that when he devised the web, almost 30 years ago, he had no idea that they would cause "so much hassle".
He apologised for the amount of wasted time, printing and paper that the inclusion of the slashes had caused.
Sir Tim is currently director of the World Wide Web Consortium and he is also working with the UK government to help open up access to government data.
Damn pesky slashes!