Customers could buy Internet time on a card and check email on any number of computers, but most would play the slot machine-style games.

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"The benefit of the Raspberry Pi is that it's very portable - if someone gives you an SD card with games on it you can come home and play it on your TV, your parents can see it, your friends can see it, " said the team's mentor Luke Staddon from IBM.

BBC: Students spend summer on Raspberry Pi and talking web