When you first start your computer, the basic input/output system (BIOS) is the software which will have to start first.
A computer can be defined as an electronic device that is designed and developed to receive data in raw form as an input and then processes these data into an information that could be used by the end user.
BIOS is an acronym for Basic Input/Output System and it can be defined as a low-level software that is designed and developed to serve as an intermediary between the operating system (OS) and the computer's firmware or hardware components.
The first step of the boot sequence of a computer is called Power On Self Test (POST), which is initiated and performed by the basic input/output system (BIOS). A POST typically checks whether or not the basic system devices and components are installed (present) and working properly;
Once the Power On Self Test (POST) is completed successfully, the basic input/output system (BIOS) begins to activate the hard disk drive of the computer and then loads the operating system (OS).
In conclusion, the basic input/output system (BIOS) is the software which will have to start first when you first start your computer.
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