Flashcards
Input devices
Cards in this deck (20)
- 1Concept keyboardEach button on a concept keyboard relates to a particular item or function. Buttons can be labelled with text or a picture. Fast food restaurants often use concept keyboards because very little training is needed to operate them and they're efficient - a single button can order an entire meal.
- 2TrackballUsed as an alternative to a mouse. To operate it the user rotates the ball which moves the pointer on screen. They are particularly easy to use for those with limited movement in their hands and are often used in Computer Aided Design (CAD) for their increased precision over a mouse.
- 3Question TextAnswer Text
- 4Question TextAnswer Text
- 5MicrophoneMicrophone
Microphones are used to input sound. In computing they can be used with voice recognition software and a word processing application to enter text. Webcams commonly have microphones built-in too. - 6Touch screenA touch sensitive visual display unit (VDU) or screen has a grid of light beams or fine wires criss-crossing the screen that are used to detect touch. Many mobile phones use touch screens and do away with the keypad entirely. They're often used on cash machines and in shopping centres too. Touch screens are robust, easy to operate and easy to reprogram.
- 7Video digitiserA video digitiser takes an image from a video camera or television and digitises it so it can be read by, and stored on, a computer. Video sequences captured using a video digitiser are often used in multimedia presentations.
- 8ScannerA scanner can be used to digitise images. They're similar to a photocopier but they make a digital copy instead of a physical copy. They can also be used with optical character recognition (OCR) software to scan in text that is then editable.
- 9Graphics tabletA graphics tablet consists of a flat pad (the tablet) on which the user draws with a special pen. As the user draws on the pad the image is created on the screen. Using a graphics tablet a designer can produce very accurate on-screen drawings as if they were drawing on paper.
- 10SensorsSensors are often used as part of a feedback cycle. They collect data continuously and are typically linked to a control program that specifies acceptable levels, eg the minimum and maximum temperature in a green house. The control program decides what to do next based on the data it's fed by the sensors.
- 11Barcode readerBarcodes are represented by black vertical bars and are read by a barcode reader. Barcodes are printed on nearly every product you buy, each product has a unique code. When read, information stored in the shop's database is recalled, such as the product name and price. This information later appears on your receipt. The scanning process also assists in stock management, reducing the stock by one each time a product is scanned/sold.
- 12Magnetic stripMagnetic stripes are built into many plastic cards such as debit or credit cards and personal identity cards. The magnetic strip on the back of the card can hold the personal details of the card owner and, with the necessary PIN, will allow access to secure information, eg bank account details. Data stored on the strip is scanned and input into a computer system by a magnetic stripe reader.
- 13Magnetic Ink Character ReaderMagnetic ink characters appear at the bottom of cheques. Banks use MICR to read the numbers from the bottom of cheques to obtain data such as account numbers and bank sort codes. A particular font is used that makes it easy for the machine to discriminate between characters. The ink is magnetised, this makes it immune to creases and dirty marks.
- 14Optical Mark ReaderAn OMR reads marks made by pencil on a printed form into the computer. OMR systems are suited to reading pre-printed forms and check boxes such as National Lottery number selection sheets and multiple choice exam papers.
- 15What is an input device ?An input device is any hardware device that sends data to a computer, allowing you to interact with and control the computer.
- 16The input device that rolls on a desktop and controls the position of the cursor on then on the screen is called a A. Touch Screen B. Light Pen C. Digitizer D. MouseD. Mouse
- 17The input device that has the monitor screen covered with a flexible layer is the A. Touch Screen B. Light Pen C. Digitizer D. MouseA.Touch screen
- 18The scanning technology, used in banks, to read the numbers at the bottom of checks is A. MICR B. OCR C. OMR D. GREC.OMR
- 19The most popular input device for computer games is called A. Trackball B. Touch Screen C. Joystick D. Pointing stickC.Joystick
- 20A POS terminal is an example of ? A. Source document entry B. Direct entry C. Keyboard entry D. B and CD. b and c
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- Flashcards on Input devices , created by Jack Housley on 18/04/2017.
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- Jack Housley
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