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One beep from your computer at startup can make your whole day. Just ask anyone that has turned on the PC and suffered the agony of several beeps and then nothing. When you purchase a computer, it will arrive with the BIOS (Basic Input/Output System), pre-installed on an EPROM (Erasable Programmable read Only Memory), chip on the main/motherboard. When you start your computer the CPU (Central Processing Unit), sends control of the PC to the EPROM BIOS. The BIOS is part of the POST (Power-On Self Test) of the computer. Once the BIOS receives the go ahead from the processor it starts its ...