3. Fill in the scheme of basic organization of a computer with the following:
Input unit, output unit, control unit, alu, memory
Unit 4 What is Output?
After reading this unit you should aim to achieve these targets by answering the questions at the end of the unit. You should be able to: - outline main output devices; - define their applications, advantages and disadvantages; - fill in the diagram of printer types; - recognize the abbreviations and give their explanations. |
Output is data that has been processed into useful form, now called Information.
Types of Output
Hard copy: printed on paper or other permanent media
Soft copy: displayed on screen or by other non-permanent means
Categories of Output
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Text documents including reports, letters, etc. |
Graphics charts, graphs, pictures |
Multimedia combination of text, graphics,video, audio |
The most used means of Output are the printer and the computer screen. Let's look at the features of each.
Printers Printer Features
The job of a printer is to put on paper what you see on your monitor. How easy this is to do and how successfully it is done determines whether or not you are happy with your printer choice. Monitor screens and printers do not use the same formatting rules. In the olden days of computers, the way something looked on the screen could be VERY different from how it would look when printed.
Early word processors didn't have a way to show what the printed version would look like. Now a word processor that doesn't have print preview, would be laughed off the shelf. Most have a WYSIWYG view, where you see almost exactly what the document will look like in print, while you are still working on it.
How fast? |
The speed of a printer is measured in:
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The faster the printing, the more expensive the printer.
What paper type used?
Continuous-Form Paper |
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Single Sheet |
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