Alternative UI design to provide access to multiple users

1. Which interface is best suited for a majority of users?
2. Which are the 3 Golden Rules of User Interface Design explain in brief?

Which interface is best suited for a majority of users?

The graphical user interface, or GUI, is the type of interface with which the majority of people are the most familiar.

Which are the 3 Golden Rules of User Interface Design explain in brief?

The UI design principals are:

Place users in control of the interface. Make it comfortable to interact with a product. Reduce cognitive load. Make user interfaces consistent.