What is the set of instructions that tells a computer to initialize the motherboard how to recognize devices connected to the computer and to start the boot process.?

The set of instructions that initializes the motherboard, recognizes connected devices, and starts the boot process is known as the BiOS (Basic Input/Output System) or UEFI (Unified Extensible Firmware Interface) in modern systems. These firmware interfaces perform hardware checks, initialize system components, and locate the bootloader to initiate the operating system. They serve as the bridge between the computer's hardware and its software during the startup process.