Hardware It refers to the physical components of your computer such as the system unit, mouse, keyboard and monitor.
System Unit Components CPU (Central Processing Unit) or the Processor is the brain of the computer. The faster the CPU, the faster the whole computer. The hard disk drive is the "data center" of your PC. It holds all of your programs and data. The sound card is an expansion card that allows the computer to send audio information to any compatible audio device such as a set of speakers. The motherboard is the circuit board to which all the other components of the computer connect in some way. All plug into the motherboard's various slots and connectors. The CPU also plugs into the motherboard via a Slot. RAM (random access memory) is a temporary storage device where files are stored The video card is an expansion card that allows the computer to send graphical information to a video display device such as a monitor or projector.