He has built satellite data acquisition systems, a multiprocessor version of Unix®, several compilers, mail systems and window managers. He has also built a WYSIWYG text editor, a constraint based drawing editor and a text editor called 'Emacs' for Unix® systems.
At Sun his early activity was as lead engineer of the NeWS window system. He did the original design of the Java programming language and implemented its original compiler and virtual machine. He has recently been a contributor to the Real-Time Specification for Java.
He is currently a researcher at Sun labs where his primary interest is software development tools.
His blog: blogs.sun.com/roller/page/jag
