Hardware

Computer hardware includes the physical parts of a computer, such as the (case) central processing unit (CPU), random access memory RAM, monitor, mouse, keyboard, computer data storage, graphics card, sound card, speakers  and motherboard

By contrast, software is the set of instructions that can be stored and run by hardware. Hardware is so-termed because it is "hard" or rigid with respect to changes, whereas software is "soft" because it is easy to change.

Hardware is typically directed by the software to execute any command or instruction. A combination of hardware and software forms a usable computing system, although other systems exist with only hardware.