What does BIOS stand for?

The term BIOS stands for Basic Input/Output System. It refers to the firmware that initializes and tests the hardware components of a computer during the booting process before handing over control to the operating system. The BIOS functions as a bridge between the computer's hardware and operating system, enabling system processes to interact with the various hardware components.

The correct answer highlights the foundational role of the BIOS in providing essential services for the hardware to function properly. This includes tasks such as detecting connected devices, initializing system settings, and allowing for the loading of the operating system from storage devices.

Understanding the role of the BIOS is critical for troubleshooting hardware issues and for tasks such as upgrading components or configuring system settings. The other options do not accurately represent the function of BIOS nor do they align with its widely accepted definition in computer science and technology.