Some Observations about User Interfaces
The user interface, or UI, represents the purpose, function, and utility of a device or piece of equipment. The UI is the most powerful aspect of a device in setting the perception of a user who operates the device or equipment. Perception is one of those intangible, subjective things we must learn to accommodate. Some basic awareness of UI principles can vastly improve the utility and
perception of any product that you design. Even a simple two-button operation with one or two light-emitting diodes (LEDs) provides a UI that significantly affects users, customers, and owners. This chapter has some very simple basic principles and examples that will help you design better products.