Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Nielsen’s Ten Heuristic Principles.
| HR1 | Visibility of System Status |
| HR2 | Match between system and real world |
| HR3 | User control and freedom |
| HR4 | Consistency and standards |
| HR5 | Error prevention |
| HR6 | Recognition rather than Recall |
| HR7 | Flexibility and efficiency of use |
| HR8 | Aesthetic and minimalist design |
| HR9 | Help, diagnosis and recovery from errors |
| HR10 | Documentation and Help |
