Language & Culture
Western, Eastern, developing...
Personality
Introvert vs extravert
Thinking vs feeling
Risk aversion
Locus of control
Planful vs playful
User diversity: Accommodate
different users
Skills
Computer newbie to hacker
Knowledge
Domain
novice to expert
Age
Young to old
Young to old
Gender
Male or Female
Income
Impoverished to wealthy
Disabilities
Visual,
auditory, motoric, cognitiveDisabling conditions
Mobility, injury, noise, sunlight