Welcome to my personal interest pages. These are personal in two ways. First, I have organized some information and links that I frequently use. Second, they are about me; friends may see what I am up to, and strangers may find out who I am. (But you need not remain a stranger! Simply send me a message at l.todd@acm.org and introduce yourself.) Keep in mind that the opinions expressed on these pages do not reflect those of Rensselaer Polytechnic Institute.