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A form usually contains labels which describe it's various input fields.

The layout of the form is just as important as what it contains. The user must be able to work out which input is required and which input is optional.

Validation of the input must be carried out prior to the data being submitted to the application so that the user can change their input. (See , )

Form also refers to physical questionaires on paper in which to fill in data by writing or printing.

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