A business card reader includes a scanning module, a USB
detecting/switching unit and two USB ports. The business card reader is
connected to at least one of a personal computer and a PDA through the two
USB ports, respectively. The USB detecting/switching unit controls the
data transmission path among the scanning module, the personal computer
and the PDA. The business card reader has a socket electrically connected
to an external power source for charging a PDA connected to one USB port.
