input output accessibility 1.b Flashcards
input devices
Keyboard- An input device and the most basic way for the user to communicate with a computer. It enables a user to input text into a computer.
Mouse- A handheld hardware input device that controls a cursor in a GUI for pointing, moving, and selecting text, icons, files, and folders on your computer. A mouse can also be used to drag-and-drop objects.
Scanner- A device that scans documents and converts them into digital data
Graphics Tablet- A computer input device that enable a user to hand-draw images, animations, and graphics with a special pen like stylus. These tablets may be uses to capture data or handwritten signatures
Microphone- A device that translates sound vibrations in the air into the electronic signals and scribes them into a recording medium or over a loudspeaker.
Webcam- A video camera which is designed to record or stream to a computer or computer network. They are primarily used in videotelephony, livestreaming and social media and security.
Sensor- Input devices that record data about the physical environment around it.1qs
output devices
Monitor- A computer monitor is an output device that displays information in pictorial or text form
Projector- is an optical device that projects an image onto a surface, commonly a projection screen
Printer- is a peripheral machine which makes a persistent representation of graphics or text, usually on paper.
Plotter- is used for printing vector graphics, like large-format printers and wide-format printers.
Speakers- it receives audio signals from your computer’s processor and outputs it as sound waves.
Headphones- it receives audio signals and outputs it as sound. It allows you to listen to music.
accessibility devices
Trackball- is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes. Users roll the ball to position the on-screen pointer, using their thumb, fingers, or the palm of the hand, while using the fingertips to press the buttons. People whose hands or fingers get fatigued typically use these.
Touch screen- is the assembly of both an input and output device.
Eye motion sensors- An eye motion sensor converts eye movements into a data stream that contains information such as pupil position, the gaze vector for each eye, and gaze point.
Braille embosser- is an impact printer that renders text as tactile braille cells.
automatic data processing
Biometric Readers – A security identification and authentication device. Uses automated methods of verifying or recognising the identity of a living person on a physiological or behavioural characteristic. These characteristics include fingerprints, facial images, and voice recognition e.g., FaceID
Barcode Readers – An optical scanner that can readd printed barcodes, decode the data contained in the barcode and send the data to a computer. E.g., scanners on tills, scan bar codes on products.
OMR- OMR (Optical Mark Recognition) acknowledges human-created marks on a specially printed paper or journal used in experiments, surveys, and so on.
RFID- RFID tags are a type of tracking system that uses radio frequency to search, identify, track, and communicate with items and people.
Smart Meters- provides detailed information on consumption in order to reduce electricity bills and increase knowledge about the status of the electricity grid.
