Computer Input and Output Devices

Questions and Answers

To recognize specific marks and characters in computerized tests like multiple choice tests.

To print and read account numbers and other information on cheques.

By recognizing text within a digital image.

Converting scanned documents and images into electronic versions with text. Signup and view all the answers

MICR uses special magnetic ink, while OCR recognizes text within digital images. Signup and view all the answers

Using MICR technology to read the magnetic ink on cheques. Signup and view all the answers

It simplifies the grading process for computerized tests. Signup and view all the answers

Converting physical paper documents into electronic versions with text. Signup and view all the answers

By converting physical documents into electronic versions with text. Signup and view all the answers

To enable computers to recognize and process printed or written text. Signup and view all the answers

Study Notes

Videos are essential for entertainment and creative work on computers
Videos can be inputted into the computer by:
- Recording directly from a webcam
- Transferring from a cell phone, digital camera, or dedicated video camera
Microsoft Windows provides a basic video editing program called Windows Movie Maker
Apple's equivalent is iMovie

Audio is an important type of input for users
Audio can be used for:
- Recording and mixing music
- Recording narration for presentations and videos
- Inputting text in PowerPoint
- Giving computer commands
To input live sound, a microphone is needed
Most laptops have a built-in microphone, but desktop computers need an external microphone
Voice recognition software, such as Dragon Home or Professional, allows users to give commands or dictate text to the computer

Voice recognition software can learn to recognize the user's speech and pronunciation
It is a great tool for users who are physically disabled
Windows provides a basic program called Speech Recognition

Clear output from computers is essential for the user experience
Sound is used to:
- Give user feedback when interacting with the computer
- Help disabled people use computers by reading interface items aloud
- Make games more realistic
- Turn computers into entertainment devices by playing music and movies
Modern computers have onboard sound circuitry that allows them to record and playback sound
External speakers or headphones are needed to produce the sound

Data projectors are output devices that connect to a computer and project images onto a screen or wall
They are useful for presenting to large groups of people
Various projector models use different technologies

OMR (Optical Mark Recognition) is used for computerized tests like multiple-choice tests
MICR (Magnetic Ink Character Recognition) is used for bank cheques to recognize account numbers and other information
OCR (Optical Character Recognition) is used to recognize text within digital images, commonly used for scanned documents and images