Input and Output
Victoria Ketell
Input
Data and instructions entered into computer
memory
Input devices are hardware components that
enter the data and instructions
Keyboards
-Attached via wires
-Function wirelessly
-Come in different sizes
Mice
-Optical mouse
-Laser mouse
-Air mouse
Other Devices
-Trackball
-Touchpad
-Pointing stick
-Touch sensitive Pads/surfaces
Pen input
-Stylus
-Digital Pens
-Signature pad
-graphics tablet
Game controllers
-gamepads
-joysticks/wheels
-light guns
-dance pads, motion sensor pads,
balance pads
Sound input
-Voice input
-Audio input
Video input
-web cams
-video conferencing
Scanners & reading devices
-optical scanner
optical character recognition converts text documents into
electronic files which can be edited
-optical readers
uses light source to read characters, codes, and marks then
convert into digital data a computer can use. These are used for:
turnaround forms and omr (optical mark recognition) devices to read
completed forms
-bar code readers
-rfid: radio frequency identification
-magnetic stripe card readers
-micr: magnetic-ink character
recognition
Biometrics
-fingerprint reader
-face scanner
-iris/retinal recognition
-hand geometry system
-voice verification
-signature recognition
Ethics involved: privacy
Terminals
Specialized, limited use computers
-pos: point of sale
-atm: automated teller machine
-dvd kiosks
Output
Data that has been processed into a
useful form. This includes viewing,
watching, printing, and hearing data.
Four basic types of output
-text
-graphics
-audio
-video
Output devices
Hardware component that conveys
information
-display devices
-printers
-speakers
-headphones/earbuds
-data projectors
-interactive whiteboards
Display devices
Visually display data
-monitors
-some include audio/visual
components, like speakers or a
webcam
Lcd monitors & screens
Lcd: liquid crystal display
-produce sharp, flicker free images
-most mobile computers and devices have
built in lcd screens
-uses liquid compound to present
information; fluorescent tubes emit light
waves toward liquid crystal cells between
two sheets of material
Ports & LCd monitors
-dvi: digital video interface; enables
digital signals to transmit direct
-hdmi: high-definition media interface;
combines dvi with hd television and
video
Plasma & crt monitors
-plasma: layer of gas between two
glass plates.
-crt: cathode ray tube; large sealed
glass tube. The front of the tube is the
screen.
-produce small amount of
electromagnetic radiation
Ways to print
-cables
-bluetooth & infrared
-memory cards
-usb sticks
-ports
-wireless internet