The use of molecular structures for electronic response has seen astonishing advancement in the past five years. This volume presents contributions from makers, measurers, and modelers of molecular electronic species. Molecular structures and their designed responses are emphasized. Particular topics include molecular interconnects, optoelectronics, transistors, logic structures, and gate moieties. Comparisons with, and hybridization with, standard semiconductor electronics are described as well. Contributors include Noel S. Hush, Mark A. Ratner, Jeffrey R. Reimers, Eldon G. Emberly, Jorge M. Seminario, Robert M. Metzger, J.-P. Launay, M.A. Reed, P.S. Weiss, M.P.Anantram, Deepak Srivastava, S.H.M. Persson, James M. Tour, K. Mullen, Andre Gourdon, Tomoji Kawai, C. Joachim, Yasuo Wada, Yishay Manassen, K. Matsushige, Masamichi Fujihira, H.C. Wolf, Ari Aviram, and D.L. Allara,.