15 websites that changed the world

Amazon used to be a large river in South America - but that was before the world wide web. This month the web is 15 years old and in that short time it has revolutionised the way we live, from shopping to booking flights, writing blogs to listening to music. Here, the Observer's Net specialist charts the web's remarkable early life and we tell the story of the 15 most influential websites to date. Tell us what you think of our choices here