A system for collecting data using a non-contact IC chip to manage the data using a computer. An IC chip sends data in a non-contact manner to a reader. The reader receives and stores the data in a memory. When an IC chip of a kind different from the IC chip is present near the reader, the reader sends the data stored in the memory to that IC chip by radio. The data received by the IC chip is supplied to a computer. The reader remains in a stand-alone setting and exchanges data with an IC chip.