Nielson's 10
A set of 10 general rules for good user interface design
Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.
Visibility of System Status
Match Between the System and the Real World
User Control and Freedom
Consistency and Standards
Error Prevention
Recognition Rather than Recall
Flexibility and Efficiency of Use
Aesthetic and Minimalist Design
Help Users Recognize, Diagnose, and Recover from Errors
Help and Documentation
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