Information Systems refer to the specific application software that is used to store data records in a computer system and automates some of the information-processing activities of the organisation.
Some Examples of Information Systems are:
Electronic Verification System: A system allowing merchants to verify that the card is valid and the credit card customer has sufficient credit to cover the purchase in a few seconds, allowing the verification to happen at time of purchase. The verification is performed using a credit card payment terminal system with communication links to the merchant's acquiring bank. Data from the card is obtained from a magnetic stripe or chip on the card.
Weather Radar: A type of radar used to locate precipitation, calculate its motion, estimate its type (rain, snow, hail, etc.), and forecast its future position and intensity. Weather radars send directional pulses of microwave radiation, which is a microsecond long, using a cavity magnetron (a high-powered vacuum tube that generates non-coherent microwaves) connected by a waveguide to a parabolic antenna.
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