San Francisco, CA - Membership and newsletter back issue information, diagrams, gallery, and animations.

The society has over 600 members worldwide, publishes a bimonthly magazine, and has a unique library. Page includes diagrams, articles on theory and practice, and photo gallery.

Toronto, Canada - Meeting location and schedule, photos of past events and diagrams.

Membership information, upcoming events, model index, affiliate directory, e-mail list, lending library, diagrams, and online store.