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AQA INFO1 S1
Revision cards for AQA AS INFO1 Inputs
Question | Answer |
---|---|
What is an input device? | The physical piece of hardware used to input data into a computer system |
What is input media? | Something that is fed into the input device (i.e. paper into a scanner, barcode, cheque) |
Manual input devices (6) | Keyboard; mouse; concept keyboard; touch screen; graphics tablet; speech recognition |
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) |
Input devices for sound (2) | Microphone; digital musical instrument (e.g. keyboard) |
Input devices for video and still images (3) | Webcam, digital camera, digital camcorder |
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. |
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. |
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 |
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. |
Specialist input devices (2) | Games controller; devices adapted for users with disabilities e.g. trackball mouse |
Factors to consider when choosing an input device (5) | Type of data Volume of data User preferences Cost Where device will be used |