Source helps creators do more of what they love
A device that enables colloaboration will lessen the chance of work having to be completely redone.

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Feature one
In such a test, the user perfroms realistic tasks by interacting with the paper prototype
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Feature two
Three techniques of paper prototyping used for usability testing are comps, wireframes
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Feature three
Rapid prototyping involves a group of designers who each create a paper prototype
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Feature four
Functionality is similarly unimportant, but in this case are closer to the final product
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