The 100 websites most affected by viruses each have about 18,000 nasties to attack net users' computers, an internet security company says.

While news channels still report the daily stock market moves from the floor of the exchange, the real US trading action is increasingly taking place in "dark pools" managed by computers.

The recording and film industries are structured around distribution of physical items - getting bits of shellac or vinyl or plastic into shops, celluloid into cinemas.

A UFO-chasing computer hacker has lost his latest battle to avoid extradition from the UK to the US where he is accused of perpetrating the 'biggest military hack of all time'.