its almost impossible to say because as of right now if you take a component out of a computer it wont work. they all work together but the processor is usually refereed to the heart of the computer.
The device where the operating system is stored on a computer is called the CPU. CPU stands for Central Processing Unit and is the heart of the computer.
operating system is a complete operating system that works on a desktop computer, a notebook computer, or mobile computing device.
computer
A peripheral device is a device that connects to the system unit of a computer. Examples include keyboards, mice, printers, and external hard drives. These devices extend the functionality of the computer system.
input device
A keyboard is a peripheral device as it is connected to the computer system. It is used for type work up to the computer.
It is an input device.
The device that is used to enter sales data into the supermarket computer system is bar code scanner.
input device
peripheral
embedded operating system
Standalone Operating System