Input and Output

Discovering computer 2010

Objective overview

describe the types of output
explain the characteristics of various display devices
describe the factors that affect the quality of an LCD monitor or LCD screen
describe various ways to print
differentiate between a nonimpact printer and an impact printer
summarize the characteristics of ink-jet printer, photo printers, laser printer, thermal printers, mobile printers, label and postage printers, and plotters and large-format printers
describe the uses and characteristics of speaker, headphone, and earbuds
identify the purpose and features of data projectors, interactive whiteboards, and force-feedback game controllers and tactile output
identafy output options far physically challenged user

What Is Output?

Output is data that has been processed into a useful form

An output device is any type of hardware component that conveys information to one or more people

Display Devices

•A display device visually conveys text, graphics, and video information

•A monitor is packaged as a separate peripheral

•Liquid crystal display (LCD) uses a liquid compound to present information on a display device

Input

Any information or data that's entered or sent to the computer to be processed is considered input. Input is most often sent to the computer using an input device such as a keyboard or mouse. In the picture to the right, is and example of input being sent from the computer keyboard to the computer.
In general can also refer to a contribution of feedback, information, or work. For example, someone may ask you for your input about a project they are doing at work or school.
Output
Any information that has been processed and comes from a computer or computer device is considered output. When someone is viewing output, they're seeing it on an output device such as a computer monitor or a hard copy print out. In the picture to the right, is an example of output being sent from the computer to a printer.

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