Charles A. Harper, P.E., is President of Technology Seminars, Inc., of Lutherville, Maryland. A widely recognized expert in materials science and applications, he is the editor of McGraw-Hill's Plastics, Elastomers, and Composites, now in its Third Edition, and industry-leading Electronic Packaging and Interconnection Series. An innovator who has played important roles in both the Society of Plastics Engineers and the Society for the Advancement of Material and Process Engineers, Mr. Harper is a frequent conference speaker and seminar lecturer. Before founding his own company, he worked for many years in product application and management specific to plastic materials and processes at Westinghouse. He is a graduate of Johns Hopkins School of Engineering.