______is the first program run on a computer when computer boots up
Operating Software is the first program run on a computer when computer boots up.
The BIOS chip tells it to look in a fixed place, usually on the lowest-numbered hard disk (the boot disk) for a special program called a boot loader (under Linux the boot loader is called Grub or LILO). The boot loader is pulled into memory and started. The boot loader's job is to start the real operating system.
The first thing a computer has to do when it is turned on is start up a special program called an operating system. The operating system's job is to help other computer programs to work by handling the messy details of controlling the computer's hardware. ... The boot loader's job is to start the real operating system.
Once the POST has successfully completed, the software loaded in ROM (sometimes called the BIOS or firmware) will begin to activate the computer's disk drives. (basic input/output system) It is a program a personal computer's microprocessor uses to get the computer system started after you turn it on.
If an active partition is found, the MBR code loads the boot sector code from that partition, known as Volume Boot Record (VBR), and executes it. The VBR is often operating-system specific; however, in most operating systems its main function is to load and execute the operating system kernel, which continues startup.