Computer hardware refers to the physical components of a computer system that can be touched and manipulated, encompassing a wide range of devices necessary for computing tasks. This includes the central processing unit (CPU), memory modules such as RAM (Random Access Memory), storage devices like hard disk drives (HDDs) and solid-state drives (SSDs), input devices such as keyboards and mice, output devices like monitors and printers, and various other components such as motherboards, graphics cards, network adapters, and power supplies, all working together to enable the functionality and operation of the computer system.