This book is an enlarged, improved, and corrected version of the most popular on-line tutorial for Jini, Sun's Java-based technology for a world of smart devices. Newmarch's book is up-to-date with the advances in Jini technology announced at the recent Java One in June of 2000 and is comprehensive without being too massive to be used effectively. Jini is Sun's attempt to make transparent distributed computing a reality - which is rather a mouthful. So what does all this mean? Imagine you could live in a world where when you moved to a new office halfway across the world or checked into a hotel, you could plug your notebook of Palm directly into the network at that location. Your notebook would immediately be recognized and have access to the services of the location - transparently. Jini is Sun's Java-based technology that has the potential to make "universal plug and play" as we just described it, possible.