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-Phy position
-Temperature
-Lighting
-Noise
-Time

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-Functional
-Sequential
-Frequency

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Human Factors
to determine the optimum size, shape and form of a product, and make it easier for people to use

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1.CLI
2.Menu
3.3D
4.Form Fill & Spreadsheet
5.Natural Lang.
6.Point & Click
7.WIMP
8.Q&A (query dialogue)
9.Web Nav

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a piece of equipment used to provide data and
control signals to an information processing system

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Devices that translate the information from the internal processing components of the computer

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“HCI is the neither the study of humans nor the study of technology, but rather the bridging between those two.”

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-The study of our interface with information
-It can affect Effectiveness , Productivity , Morale ,Safety

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Human-computer interaction is a discipline concerned with the design, evaluation and implementation of interactive computing systems for human use and with the study of major phenomena surrounding them.