Unit 1 - Section 1 - Inputs - PROPER COPY
- Created by: annalee1234
- Created on: 06-12-16 11:17
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- Input devices
- Keyboard
- Ergonomic
- Specially designed to reduce Repetitive Strain Injury and to improve efficiency
- QWERTY
- Contains all the letters and numbers on a keyboard, special keys such as ESC,ALT.CTRL.SHIFT and the function keys.
- Ergonomic
- Mouse
- Mechanical
- Has a rolling ball and the computer senses its position on a flat surface
- Optical
- Uses a light sensor to detect motion and doesn't need a mouse mat
- Mechanical
- Scanners
- Used to turn paper-based images into digital images
- Bar code scanners
- Hand held scanners
- Flat-bed scanners
- Drum scanners
- The quality of the image being scanned is dependent on the resolution of the scanner.
- Higher the resolution, the higher the quality of the image.
- Touch sensitive devices
- Concept Keyboards
- Touch Screens
- Senses when an area has been touched and interprets the signal.
- Often used in public areas and on PDA's as they are quick and simple to use and don't take up too much space
- Graphics tablet
- Sound input
- Speech Recognition
- User speaks into a microphone. The sounds of the words are compared to a dictionary of sounds and converted into computer-readable text.
- Unreliable as different accents may not be picked up.
- User speaks into a microphone. The sounds of the words are compared to a dictionary of sounds and converted into computer-readable text.
- Automated input
- Card Readers
- Radio Frequency ID (RFID)
- Untitled
- Video input
- Webcams
- Digital cameras
- Optical Mark Reader (OMR)
- senses the position of marks on data capture forms, such as lottery tickets or multiple choice exams
- Optical Character Reader (OCR)
- Uses a scanner and specialist software to turn paper-based text into computer characters
- Magnetic Ink Character Reader (MICR)
- Used by banks to process cheques
- Keyboard
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