My books

• Good and Real: Demystifying Paradoxes from Physics to Ethics (MIT Press/Bradford Books, May 2006)
• Made-Up Minds: A Constructivist Approach to Artificial Intelligence (MIT Press, 1991)

PGP (free, secure encryption)

• download PGP freeware
• my PGP public key

Amusement

• Hand-held "Tinkertoy" (K'nex) Tic-tac-toe Machine
• Literacy Quiz
• Bible Digest

Some aviation photos (and some links for pilots)

• Boston and Cambridge
• NYC and Long Island (spring 2001)
• Long Island and NYC (2002)
• Chicago
• Toronto (2006)
• Toronto (2007)
• San Francisco
• Palo Alto
• Van Nuys
• A helicopter ride
• Among the clouds
• Night flying
• Miscellaneous

Some good causes

• American Civil Liberties Union
• Center for Naturalism
• Electronic Frontier Foundation
• Middle East Research and Information Project
• N.A.A.C.P.
• National Organization for Women
• Queer Resources Directory

Some friends' and colleagues' pages

• Phil Agre
• Mario Bourgoin
• Jim Davis
• Peter Davis
• Daniel Dennett
• Philip Greenspun
• Mark Gross
• Ken Haase
• Brian Harvey
• Gregor Kiczales
• Anna Korteweg
• Stan Kugell
• Henry Minsky
• Margaret Minsky
• Marvin Minsky
• Josh Putnam
• Deb Roy
• Richard Stallman
• Oliver Steele
• Uri Wilensky

email: gld@alum.[initials of Massachusetts Institute of Technology].edu

(Address format is intended to impede harvesting bots. Humanoids, please make the obvious substitution.)