Here is a new and improved list of the heuristics. Now there are 10. The system should always keep users informed about what is going on, through appropriate feedback within reasonable time. The system should speak the users' language, with words, phrases, and concepts familiar to the user, rather than system-oriented terms. Follow real-world conventions, making information appear in natural and logical order.
Support undo and redo.
Consistency and standards Users should not have to wonder whether different words, situations, or actions men the same thing. Follow platform conventions. Error prevention Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Recognition rather than recall Make objects, actions and options visible. The user should not have to remember information from on part of the dialogue to another.