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|style="width: 70%;|During the mechanical and electric analog phases of technology, information was created by a series of physical changes converted into electrical impulses for storing and  machine, and each analog information storage required a specialized equipment to decode and read the information. A cassette player or a gramaphone disc is an example of such a device.  Analog machines could be programmed for specific applications as well as for generalized computation. Representing information for computing using physical changes often meant that the results could not be accurate as the changes could not be replicated exactly.   

During the mechanical and electric analog phases of technology, information was created by a series of physical changes converted into electrical impulses for storing and  machine, and each analog information storage required a specialized equipment to decode and read the information. A cassette player or a gramaphone disc is an example of such a device.  Analog machines could be programmed for specific applications as well as for generalized computation. Representing information for computing using physical changes often meant that the results could not be accurate as the changes could not be replicated exactly.   

|style="width: 30%;|See below how a difference engine, designed by Charles Babbage worked.

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See below how a difference engine, designed by Charles Babbage worked.

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