bootloader

A bootloader is a program that loads and executes the main operating system of a computer or mobile device. It is typically stored in firmware or read-only memory and is the first program to run when a device is turned on or restarted. The bootloader is responsible for initializing and configuring the hardware components of a device, such as the processor, memory, and input/output devices, and for loading and launching the operating system kernel. It may also provide additional functions such as firmware updates, system recovery, and booting from alternative sources such as a network or external storage device.