26-12-2017, 10:41 AM
*Touch screen is an input/output touch sensible display.
*Touch screen is sensitive to - Pressure
*Touch screen technology is widely used in bank ATMs, mobile phones, tablet computer etc.
*Touch pad is a pointing device used in portable computers like laptops.
*Track ball is a stationary pointing device with a ball mechanism on top.
*Joy stick is a pointing device with a vertical stick mounted on a base
*Joy stick is used as an input device when playing computer games and in ultra sound scanners in medical field.
*Light pen is a pen shaped pointing device that can detect the presence of light
*CAD users use light pen to directly draw on the screen.
*It is used in railway and airline reservation counters and it also used by doctors and dentists
*Scanner is an input device which converts paper documents (images and printed text) into electronic format and transfers them to a computer.
*OCR converts a scanned image (bitmap) to usable word processing format for editing by analysing forlight and dark areas in order to identify each.alphabetic letter or digits.
*MICR is primarily used by the banking industry to facilitate the processing of cheques.
*Device which helps to watch TV on computer
Ans : TV tuner card
*Primary output device of a computer Monitor
*‘Black and White Monitor’ is known as- Monochrome Monitor Cathode Ray Tube
(CRT) technology was used in older monitors.
*Modem monitors are typically a thin film transistor liquid crystal display (TFT-LCD) thin panel.
*Organic light emitting diode (OLED) monitors provide higher contrast and better angles than LCD.
PRINTER
*Printers before 1950 are known as
Ans : Punch cards
*Fastest printer
Ans : Laser printer
