BIOS :- BIOS stand for Basic Input Output System. It is the low - level
system software that reside on a Read Only Memory (ROM) chip in the PC.
The BIOS programs is a set of routines for dealing with input / oputput device
such as keyboard, display, disks and serial ports , parallel ports. Programs
can access thess devices by calling the BIOS routines and need not be aware
of differences between machines that could the way input/output is
performed. Thus, BIOS enable various to access the PC's hardware.
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