Tim Berners-Lee wrote the first Web client, or browser editor, on a NeXT computer called WorldWide Web in 1990 with the aim of building a creative tool that would allow people to use the Internet.
He apparently finished the code on Christmas Day, 1990 while all his associates were feasting on mince pies and getting into the port. He released the program to a number of much sobered up people at CERN in 1991.
Later that year they started to port WorldWideWibble from NeXT to the bit more common C language and created the new browser libwww and the whole lot took off. µ