This series of lectures, given at the 1997 Conference of the Association for Computing Machinery, presents visions of tomorrow’s information technology as seen by today’s experts. In this second tape Joel Birnbaum traces an evolutions for elect ronic, non-electronic, biological and optical computing; Pattie Maes considers how intelligent agents may interact with software ecologies, and Nathan Myhrvold speculates on the future of software and Windows 47 (as in 2047).