Revision cards for AQA AS INFO1 Inputs
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is an input device? | The physical piece of hardware used to input data into a computer system
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| What is input media? | Something that is fed into the input device (i.e. paper into a scanner, barcode, cheque)
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| Manual input devices (6) | Keyboard; mouse; concept keyboard; touch screen; graphics tablet; speech recognition
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| Automated input devices (7) | Card readers; scanners; Optical Mark Recognition (OMR); Optical Character Recognition (OCR); barcode reader; Magnetic Ink Character Recognition (MICR); RFID (Radio Frequency Identification)
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| Input devices for sound (2) | Microphone; digital musical instrument (e.g. keyboard)
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| Input devices for video and still images (3) | Webcam, digital camera, digital camcorder
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| What is OCR, what is it used for and why? | Optical Character Recognition - turns text on paper into computer characters and creates file with editable text. Mainly used for forms such as passport applications - saves time over having to enter data manually.
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| What is OMR, and what is it used for? | Optical Mark Recognition - senses position of marks on specialist data capture forms, such as multiple choice exams or lottery play slips.
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| What is MICR and what is it used for? | Magnetic Ink Character Recognition used for processing cheques, very expensive to produce and difficult to forge
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| What is RFID and what is it used for? | Radio Frequency Identification - radio waves transmit a unique serial number from a tag attached to an object that is scanned by a specialist reader. Used for tracking goods or equipment, and in Oyster cards.
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| Specialist input devices (2) | Games controller; devices adapted for users with disabilities e.g. trackball mouse
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| Factors to consider when choosing an input device (5) | Type of data
Volume of data
User preferences
Cost
Where device will be used
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