What is an input screen and what must be included in an input screen?Please explain in detail the things that should be included in an input screen.

I believe the input screen in the question refers to the
specific type of displays in computer screen or
monitors.

As the name implies input screen are used to
facilitate entering of input data in computer systems. Such inputs screens are designed
specifically for each of the computer application system. These are designed to make the
task of inputting data in a computer system, easy, fast and error
free.

The simples form of a input screen will display the
title or name of various data items to be entered, with provision to navigate from one
item to another, and a place to display the actual data entered through keyboard against
each item of data.

However, a typical input screen used in
most of computer application will have features such
as:

• Ability to choose data to be entered from a
  given set of options.


• Show additional data stored in the
  computer based on the information entered in the screen For example, when an employee
  code is entered the screen may display additional information like name and  designation
  of employee based on the employee record.


• Check the
  correctness of the entries based on set rules. For example an employee name should not
  contain numbers and the employee code must conform to the required code
  structure.


• Identify and alert on incomplete
  data.


• Prevent accessing or modification of data by
  unauthorised persons.