Fichas
Unit one: Input devices
Fichas del conjunto (13)
- 1Optical mark recognition (OMR)OMR senses the position of marks on data capture forms such as multiple choice exam papers or lottery entry sheets.
- 2Optical character recognition (OCR)OCR uses a scanner and specialist software to turn paper-based text into computer characters.
- 3Digital camerasThe camera can be connected to the computer by a USB cabel or wirelessly through bluetooth, this enables images to be uploaded so that they can be printed or edited. Professional photographers will use digital single lens refelx (DSLR) cameras which can have extra lenses to allow them to capture a variety of images - close ups, distant landscapes etc.
- 4Magnetic Ink Recognition (MICR)MICR is used by banks to process cheques and other negotiable documents. A magnetic reader translates the shaped characters printed along the bottom of the cheque inot numbers so that they can be stored by a computer.
- 5Radio frequency identification (RFID)RFID uses radio waves to transmit a unique serial number as a form of ID for objects. RFID tags are soemtimes called smart labels or radio bar codes.
- 6Speech recognitionSpeech recognition spfwtare is used to convert the words the users says through a microphone into computer readable text. The words a user says are compared with a dictionary.
- 7ScannersScanners are used to turn paper-based pictures or documents into digital images.
- 8KeyboardThe most common input device in most computers is the standard QWERTY keyboard. A skilled typist will be able to enter adat very quickly using a keyboard. Mobile phones contain a small version of keyboards, which are usualy called keypads.
- 9MouseThere are two main types of mouse, mechanical and optical. A mechanical mouse has a roller ball and the computer senses its position on a flat surface. An optical mouse uses a light sensor to detect motion and does not need a mouse mat.
- 10Touch screensA touch screen senses when an area of the screen has been touched. They are often used in public places as they are quick and easy to use.
- 11Bar code readersA bar code is a pattern of black and white lines which represents a number. They are often used in electronic point of sale (EPOS) systems. The bar code is scanned, and the product number it generates is entered into the computer system and acts as the primary key for the product in the stock database.
- 12Graphics tabletsGraphics tablets( digitising tablets) are mainly for drawing. A stylus is used to draw on a flat plate. It feels rather like a pencil and can also be used to select icons.
- 13PDAPDA is a personal digital assistant is a small computer, about the size of a hand, so sometimes called a plamtop. They often use touch screens as combined input/output devices. A small stylus or fingertip may be used to enter data. They often have handwriting recognition software so that the handwritten notes cen be converted into characters that can be processed by the computer.
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- Fichas sobre Unit one: Input devices, creado por Anna Wlottkowska el 08/03/2017.
- Creado por
- Anna Wlottkowska
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