Think about the best and the worst data input screens that you have used, heard about, and/or worked on. Using your own experience, as well as this chapter, list at least five input screen requirements and/or principles (other than the one described in Question 3) that you consider to be important. Explain why you selected each of them.

Data from Question 3

Point of sale (POS) terminals, such as those used in ATMs, gas stations, and in stores, have become extremely common due to their convenience and versatility. But in terms of human interface design, their input methods sometimes leave something to be desired. What are the areas where you think improvement is needed?