Ian H. Witten is a professor of computer science at the University of Waikato in New Zealand. He directs the New Zealand Digital Library research project. His research interests include information retrieval, machine learning, text compression, and programming by demonstration. He received an MA in Mathematics from Cambridge University, England; an MSc in Computer Science from the University of Calgary, Canada; and a PhD in Electrical Engineering from Essex University, England. He is a fellow of the ACM and of the Royal Society of New Zealand. He has published widely on digital libraries, machine learning, text compression, hypertext, speech synthesis and signal processing, and computer typography. He has written several books, the latest being Managing Gigabytes (1999) and Data Mining (2000), both from Morgan Kaufmann.
Michael Lesk joined the computer science research group at Bell Laboratories after receiving his Ph.D. degree in Chemical Physics in 1969. He went on to manage the computer science research group at Bellcore, where he is now a chief research scientist. He is best known for his work in electronic libraries, but has worked in document production and retrieval software, computer networks, computer languages, and human-computer interfaces as well. Past chair of the Association for Computing Machinery’s special interest groups on Language Analysis and Information Retrieval, Lesk was Senior Visiting Fellow of the British Library in 1987 and is currently Visiting Professor of Computer Science at University College London. Lesk has been recently elected to the US National Academy of Engineering, in recognition of his contributions to UNIX applications, information systems, and digital libraries.