INPUT AND OUTPUT DEVICES PAGES 19-27
KEYBOARDS:
USES: input of data into applications software
ADVANTAGES: easy for people to use and fast entry of new into a document.
DISADVANTAGES: difficult for someone with limited are use to use.
NUMERIC KEYPADS
USES: ATMs and chip and PIN devices when paying b debit or credit.
ADVANTAGES: faster than standard keyboard when entering numeric data and portable.
DISADVANTAGES: has small keys which can make input more difficult.
POINTING DEVICES
MOUSE
USES: opening, closing and minimising software, and grouping, moving and deleting files.
ADVANTAGES: faster way to choose an option than using a keyboard and is quick to navigate through apps and the internet.
DISADVANTAGES: difficult to use if no flat surface is readily available and is easy to damage.
TOUCH PAD
USES: can work as a mouse
ADVANTAGES: same as mouse an is more portable tan using a mouse
DISADVANTAGES: can be difficult to use compared to a mouse and difficult to use doing certain operations.
TRACKBALL
USES: used in apps when the user has a disability and used in cars to select functions such as the radio, telephone, music...
ADVANTAGES: doesn't need the same fine control as a mouse and needs less desk space than a mouse or keyboard.
DISADVANTAGES: not supplied with computers as standard, therefore more costly and use may need training .
REMOTE CONTROL
USES: used to control multimedia systems and to control TV, DVD players...
ADVANTAGES: can be used from a long distance.
DISADVANTAGES: difficult to use if the user has limited hand movement and easy to block signal.
JOYSTICKS
USES: used in video games and simulators.
ADVANTAGES: easier than a keyboard and control is more realistic.
DISADVANTAGES: more difficult to use than a mouse.
DRIVING WHEEL
USES: used in video games and in simulators.
ADVANTAGES: easier than a keyboard and a joystick, and the "driving experience" is better.
DISADVANTAGES: can be more expensive than a mouse or joystick and the steering wheel might give an unrealistic "feel".
TOUCH SCREENs
USES: interactive white board in education and in ATMs
DISADVANTAGES: limited number of options available and the screen can get very dirty
ADVANTAGES: easy method for choosing options and user friendly- no training necessary.
SCANNER
To scan documents, photographs and barcodes at POS terminals.
ADVANTAGES: images can be stored for editing at a later date and more faster and accurate than typing in documents again.
DISADVANTAGES: quality can be limited by the scanners resolution and can be fairly slow.
DIGITAL CAMERAS AND VIDEO CAMERAS
ADVANTAGES: easier to produce better-quality photographs and easier and faster to upload photographs to a computer than having to scan it.
DISADVANTAGES: resolution isn't has good as traditional cameras and need a computer to use cameras properly.
USES: to take photos
MICROPHONES
ADVANTAGES: faster to read text than no type it in using a keyboard and can improve safety.
DISADVANTAGES: sound files can use up a lot of storage and voice-recognition isnt as accurate as typing in manually.
USES: to input speech/ sound to be used in various apps and used in video conferencing.
SENSORS
ADVANTAGES: more accurate reading taken when compared to human operations and reading are continuous- no breaks in the monitoring.
DISADVANTAGES: faulty sensors can give spurious results.
USES/ TYPES: temperature, pressure, light, sound, humidity, pH.