Computer System Is a complete, working computer. The computer system includes not only the computer, but also any software and peripheral devices that are necessary to make the computer function.
1. Hardware
2.Software
3.Peopleware / Live ware
HARDWARE
It is best described as a device that is physically connected to your computer or something that can be physically touched.
INPUT DEVICE –any device that allows the person to communicate information to the computer / gives information to the computer system so that it can perform its tasks
Bar Code Reader –is an input device used to scan a Bar Code Reader pattern of lines using optical sensing techniques the line patter is coded information about the item to which it relates (e.g. the price and description of an item of merchandise).
Digital Camera –record images in digital form.
Digitizing Tablet –an input device that enables you to enter drawings and sketches into a computer. A digitizing tablet consists of an electronic tablet and a cursor or pen. A cursor (also called a puck) is similar to a mouse, except that it has a window with crosshairs for pinpoint placement, and it can have as many as 16 buttons.
Keyboard –is the most commonly used input device, similar to a typewriter keyboard that is a part of a terminal that is connected to a computer elsewhere.
Mouse–which has a ball on its underside, is rolled on a flat surface, usually the desk on which the computer sits / a device that controls the movement of the cursor or pointer on a display screen, originally designed by Xerox
Trackball –it is a variation on the mouse, but it is an upside mouse-you roll the ball directly with your hand.
Touchpad –your finger as the pointer/ is a pressure-sensitive pad that is smaller, more accurate, thinner, and less expensive to build than a trackball.
Scanner – Devices that can read text or illustration sprinted on paper and translate the information into a form the computer can use. A scanner