RICHARD POST is Assistant Dean Emeritus, Ohio University and Board Member and Webmaster of the University's Emeriti Association. He has vast experience in instructional technology and design and has authored numerous magazine feature articles and columns on the historical development, engineering, and practical impact of electronics and communications technologies. CHAD SNYDER is Professor of Chemistry at Liberty University where he teaches organic, inorganic, general, and forensic chemistry. He authors end-of-chapter problems and test bank questions for a variety of chemistry titles and frequently serves as a subject matter expert in chemistry. CLIFFORD HOUK was Professor of Health Science at Ohio University. He held a doctoral degree in inorganic chemistry, and was a fellow of the American Industrial Hygiene Association (AIHA). Dr. Houk co-authored the first two editions of Chemistry: A Self-Teaching Guide.