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Input Devices

Terms in this set (16)

input devices
hardware device used to send data and control signals to processing systems such as a computer or information appliance
Mouse
controls a cursor in a GUI and can move and select text icons files and folders.
Joystick
a device which is mainly used when playing games. It consists of a vertical stick that is moved in many directions to control an object on the screen
Keyboard
Commands and data are entered by pressing the keys on the keyboard
Source Document Readers
use information on documents that have already been created as input.
Optical Character Reader (OCR)
senses the presence of text by recognizing the characters. Capture data from airline tickets telephone and electricity bills and Reading postal codes
Optical Mark Reader (OMR)
senses the presence of pencil and pen marks that are made on special forms mainly used for marking multiple-choice papers and recognizing information entered on a questionnaire or registration form.
Magnetic Ink Character Reader (MICR)
documents such as cheques have information written on them using special magnetic ink. These characters usually represent information such as bank numbers account numbers and cheque numbers
Scanner
device that is used to scan images and text. There are two basic types, the handheld, and the flatbed. The image or text is scanned by a photoelectric device and an electronic representation of the object being scanned is stored on the computer.
Bar Code Scanner
a scanning device that is used to scan bar codes. These bar codes are parallel lines of varying thickness that is used to identify the item that it is found on. These devices are used in supermarkets and retail stores.
Point of Sale Terminal (POS).
terminals to which an online input device is connected that processes transactions as soon as the data is read.
Light Pen
an input device used like a pencil. It emits an electronic signal to the screen in the exact spot where entry is needed. Light pens do not work on all types of computer screens
Touch Screen
A pressure-sensitive screen that accepts input via the press of a finger.
Microphone
a device that is used to allow voice and sound to be entered into the
computer. One application of the microphone is Voice Data Entry, the process of
speaking to the computer through the microphone as a means of inputting data. The
Voice recognition software then converts the spoken word(s) into text.
Graphics Tablets and Pads
these are pressure sensitive surfaces that are commonly
used in Computer Aided Design (CAD). A stylus or a puck is used to draw on the pressure
sensitive surface; this is then converted to a electronic representation on the computer.
This device is usually used by Architects and Engineers.
Digital Camera
this device allows for data in the form of pictures to be captured and entered into the computer for storage or processing. The quality of the image to be stored is dependent on the resolution of the camera. The resolution refers to the number of pixels (picture elements) that are used to display the image. Pixels are dots that are used to form an image.
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