My research interests are in the area of programming languages, operating systems, object-oriented systems and distributed computing, and more specifically in the region where they overlap (such as language design for distributed Object-oriented computing.) My favorite system for trying out ideas is Squeak Smalltalk. I have written a few Squeak goodies that I believe are generally useful. I have been actively working on Traits with the folks from SCG in Bern; see Nathanael Schärli’s Traits page for details. I’m a co-author of two books on Smalltalk programming, Squeak by Example, and Pharo By Example.