Smart cards a fascinating and fruitful adventure

No internal timer, battery. No keyboard, display, network interface. Current generation: μ-processor: 16-bits, 10MHz. RAM: 4K. ROM: 100K for code storage. E2PROM (105 updates ): 64K for data storage. I/O: serial (9600 bps), Contactless protocols: MiFare, FeliCa, Calypso.