ROGER W. WELKER is founder and Principal Scientist at R. W. Welker Associates, an independent consulting firm specializing in complex contamination, electrostatic discharge, and quality control issues. His technical expertise is in manufacturing technology, cleanroom and ESD protected workplace management, cleaning process development, analysis, and statistics.

R. NAGARAJAN, PhD, is Professor in the Department of Chemical Engineering at the Indian Institute of Technology, Madras. He has fifteen years' R&D experience in contamination control and chemical integration with IBM's Storage Systems Division inSan Jose, California.

CARL E. NEWBERG is President and Director of Laboratory Operations for River's Edge Technical Service/MicroStat Laboratories.