Firmware is a software program or set of instructions programmed on a hardware device. It provides the essential instructions for how the device communicates with the other computer hardware. Unlike regular application, firmware can’t be altered or removed by a finish-person with no help of specific applications and stays on that system whether or not it is off or on.

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Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone.