Yesterday i already share about chapter 6 in my blog.
So, today i want to share with you guys about summary of chapter 7.
CHAPTER 7 - INPUT AND OUTPUT
What do you know about input?
- Input is any data and instructions entered into the memory of a computer
-Commonly used input methods include:
- Keyboard
- A keyboard is an input device that contains keys users press to enter data and instructions into a computer or mobile device
- An ergonomic keyboard has a design that reduces the chance of repetitive strain injuries
- Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace
- Pointing devices
- A pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device
- A mouse is a pointing device that fits under the palm of your hand comfortably
- Optical mouse, laser mouse, and touch mouse
- A touchpad is pointing device. A touchpad is a small, flat, rectangular pointing device that is sensitive to pressure and motion
- A pointing stick is a pressure-sensitive pointing device shaped like a pencil eraser that is positioned between keys on a mobile computer keyboard
- A trackball is a stationary pointing device with a ball on its top or side
- Motion input
- With motion input, sometimes called gesture recognition, users can guide on-screen elements using air gestures
- Voice input
- Voice input is the process of entering input by speaking into a microphone
- Voice recognition, also called speech recognition, is the computer or mobile device’s capability of distinguishing spoken words
- Touch screens
- Pen input
- With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections
- A graphics tablet, also called a digitizer, is an electronic plastic board that detects and converts movements of a style or digital pen into signals that are sent to the computer
- Video input
- Video input is the process of capturing full-motion images and storing them on a computer or mobile device’s storage medium
- A webcam is a type of digital video (DV) camera that enables a user to:
- Capture video and still images
- Broadcast live images over the internet
- Conduct videoconferences
- Send email messages with video attachments
- Add live images to instant messanges
- Make video calls
- Audio input
- Audio input is the process of entering any sound into the computer such as speech, music, and sound effects
- Music production software allows users to record, compose, mix, and edit music and sounds
- Scanners and reading devices
- A scanner is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process
- A flatbed scanner works in a manner similar to a copy machine except it creates a file of the document in memory instead of a paper copy
- An optical reader is a device that uses a light source to read characters, marks, and codes and then converts them into digital data that a computer can process
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Optical mark recognition (OMR)
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Optical character recognition (OCR)
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- Magstripe readers read the magnetic stripe on the back of cards such as:
- Creadit cards
- Bank cards
- Identification cards
- Entertaiment cards
What do you know about output?
-Output is data that has been processed into a useful form
- Displays
- A display visually conveys text, graphics, and video information
- A monitor is a display that is packaged as a separate peripheral device
- LCD monitor
- Today’s monitors use a digital signal to produce a picture
- To display the highest quality images, the monitor should plug into:
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A Display Port |
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- Home users sometimes use a digital television (DTV) as a display
- HDTV is the most advanced form of digital television
- A Smart TV is an Internet-enabled HDTV
- Printers
- A printer produces text and graphics on a physical medium
- A nonimpact printer forms characters and graphics on a piece of paper without actually contacting the paper
- Ink-jet printers
- An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper
- Color or black-and-white
- Speed is measured by the number of pages per minute (ppm) it can print
- All-in-one printers
- An all-in-one printer is a single device that prints, scans, copies, and in some cases, faxes
- Sometimes called a multifunction printer
- Photo printers
- Thermal printers
- A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper
- Laser printers
- High speed
- Black and white
- Colour
- High quality
- Mobile printers
- A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device
- Label printers
- A label printer is a small printer that prints on an adhesive-type material that can be placed on a variety of items
- Impact printers
- Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper
- Other output devices
- Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper
- Headphones are speakers that cover or are placed outside of the ear
- Earbuds (also called earphones) rest inside the ear canal
- A data projector is a device that takes the text and images displaying on a computer or mobile device screen and projects them on a larger screen
- Joysticks, wheels, gamepads, and motion-sensing game controllers can be considered output devices when they include force feedback
- Technology that sends resistance to the device in response to actions of the user
- Assistive Technology Input and Output
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Braille input
Braille printer
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Thankyou and bye byee
