- Psychology and Cognitive Science
- Involves the user's perceptual, cognitive, and problem solving skills
- Ergonomics
- Involves the user's physical capabilities
- Sociology
- Helps to understand the wider context to the current interaction
- Computer Science/Engineering
- Building the necessary technology
- Emphasis made on pragmatics vs theory, aka it needs to be known how to apply the theory to the problem
- Graphic Design
- Used to create effective, and usable interfaces
- Technical Writing
- Used to produce the specifications for the developers, and the manuals for the users
