There are two types of monitor display technologies available today - liquid crystal display (LCD) a thin, flat display device made up of a number of color or monochrome pixels arrayed infront of a light source or reflector, and the older Cathode Ray Tube (CRT) a vacuum tube containing an electron gun and a flourescent screen with internal or external means to accelerate and deflect the electron beam, used to form images in the form of light emitted from the fluorescent screen.
Today, LCD technology though more expensive, is the front -runner, offering an exciting alternative to yesterday's power-hungry CRT displays: LCD devices are light-weight, economical to use, and produce very low electro-magnetic emissions. From touch-sensitive screens, to highly integrated 'intelligent' displays with pre-programmed personal preferences, LCD technology promises a new experience in interactive displays at ATMs, Railway stations and wherever information is required by the public.
Joystick, Mouse and Keyboard are Input/Output devices for computers. Apart from games applications, they are also used in Industrial Control panels, Medical equipment to smoothly and accurately control various system functions; for controlling machines such as elevators, cranes, trucks, and powered wheelchairs.
