The computer 's miniature uncased circuit board is crowded with an Ethernet connection for the internet , two USB ports and an SD card port for memory and is powered by a standard USB mobile charger . $ 35 credit card-sized Raspberry Pi computer sells out within hours of launch . Comment: Even cheaper version of Raspberry Pi in production soon , will retail at $ 25 .
$ 35 credit card-sized Raspberry Pi computer sells out within hours of launch . Comment: Even cheaper version of Raspberry Pi in production soon , will retail at $ 25 .