Professors at Carnegie Mellon University have posted this Introduction to Mechanisms in HTML format. Easy to follow, this website provides a great overview of Physical Principles, Mechanisms, Machines, Basic Kinematics of Constrained Rigid Bodies, Planar Linkages, Cams, and Gears, among others mechanisms. Also provided are separate links to each of the figures within the text.

In today's technology-driven marketplace, groundbreaking advances are made daily, and many companies are struggling to keep up. Rapid prototyping is a system that decreases a product's time-to-market, which can give companies that practice it an edge. Stanford University's Rapid Prototyping Laboratory is very active in research, and its Web site has information on the many projects with which it...