Computing Essentials 2004
Chapter 5 Input and Output
I.Ch 5 Input and Output
A.Competencies
1.Describe input.
2.Describe keyboard entry, pointing devices, and scanning devices.
3.Discuss image capture, digitizing, and audio input devices.
4.Discuss output.
5.Describe monitors, printers, and audio output.
6.Discuss combination input and output devices.
B.Introduction
Computer input and output devices are essentially translators.
Input devices translate numbers, letters and actions that people understand
into a form that the computer can process.
Output devices translate the machine language the computer can process
back into letters, numbers, sounds, and images that people can understand.
Competent end users need to know about the most common input devices
such as keyboards, mice, scanners, digital cameras, digitizing tablets,
voice recognition devices, and MIDI.
They also need to know about the most common output devices such as
monitors, printers, and audio output.
They also need to know about combination input/output devices such as
fax machines, Internet telephones, and terminals.
C.What is Input?
Input is any data or instructions that are used by a computer.
They can come directly from you or from other sources in the form of text,
numbers, pictures, voice.
Input devices are hardware used to translate words, sounds, images, and
actions that people understand into a form that the computer can process.
D.Keyboard Entry
Keyboards convert numbers, letters, and special characters into electronic
signals.
Traditional, ergonomic, flexible and folding are types of keyboards.
