Francisco Osorio Gálvez is a senior developer and technical leader working at Citigroup, and previously at IBM. He works designing, developing, and leading large Java enterprise systems for the banking industry. He enjoys working on different technologies just for fun. You can contact him at <[email protected]>.

Peter Rice is Professor Emeritus of Mathematics from the University of Georgia, USA. He began a career in the IT industry after retirement, which led him to becoming a certified Microsoft trainer, an IBM trainer, and to do extensive work as an independent trainer working from his own company, PM Rice Consulting, Inc. In addition, he has created and worked as principal architect on a number of commercial programs. He also works in a number of languages.