Allen has provided, substantial contributions in the research, design, and implementation of innovative end-user applications. His primary interest is in creating simple interfaces for complex tasks, including intelligent interfaces, customizable software, user interface design, software design, and instruction. Edited the book "Watch What I Do: Programming by Demonstration", which was published by MIT Press in 1993 (~3000 sold). He has created several successful end-user programming systems: Eager, Stagecast Creator, and CoScripter. Ph.D. Computer Science, Yale University, A.B. A.B. Mathematics, Princeton University.