Introduction.
A Symposium honoring Joseph H. Eberly on his 65th birthday was organized in Rochester on October 20 and 21, 2000. Joe, of course, is also Editor of Optics Express, and the concept of electronic publishing occupied him for many years before Optics Express came into being. The idea of publishing a special issue in Optics Express on the occasion was inevitable. Everyone invited to the Symposium was invited to submit a paper. This Focus Issue is the result.
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