1. Design of the Conceptual Model Winograd, Chapter 2

2. David Liddle Xerox PARC Vice President - IBM Instructor at Stanford Recently employed by various venture capital firms

3. Xerox Star (Why was is cool?) Direct manipulation of objects WYSIWYG –What You See Is What You Get Consistency of commands –Generic commands

4. Software Design: Determining the user’s experience with a piece of software…

5. User’s Conceptual Model Represents what the user is likely to think Metaphors –Not connected to the physical world –Recognition (not recall) –Spreadsheets, desktops

6. Prototyping and User Trials (In the development of Xerox Star) Build prototypes that users can test Get users feed back Alter the specification Repeat