A smart card which is comparable in size to a credit card or atm card, stores personal data on a thin microprocessor embedded in the card.
In a microprocessor, the logic and control for data processing are housed on a single circuit board or a small number of electronic components. The circuitry needed to carry out the duties of a computer's central processing unit is contained within the microprocessor. The integrated circuit is capable of reading, understanding, and carrying out program instructions as well as carrying out mathematical operations.
The microprocessor is a multifunctional, clock-driven, register-based, digital integrated circuit that takes binary data as input, processes it in accordance with instructions stored in its memory, and outputs the results. Combinational and sequential digital logic are both found in microprocessors, which use binary numbers and symbols to perform operations.
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