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.