This and its companion Volume 2 comprise the proceedings of the International Symposium on "Solution Behavior of Surfactants - Theoretical and Applied Aspects" organized under the auspices of the 11th Northeast Regional Meeting of the American Chemical Soci­ ety held in Potsdam, N. Y. , June 30-July 3, 1980. This Symposium re­ presented the third event in the series of symposia dealing with the topic of surfactants in solution. The first Symposium was held in Albany, N. Y. , in 1976 under the title "Micellization, Solubili­ zation and Microemulsions", 1 the proceedings of which have been doc­ umented in a two-volume set • The second was held under the title "~olution Chemistry of Surfactants" in 1978 in Knoxville, TN, an~ the proceedings of this event have also been properly chronicled • Apropos, the fourth biennial Symposium in, this series is entitled "International Symposium on Surfactants in Solution" (K. L. Mittal and B. Lindman, Cochairmen) and is scheduled to be held from June 27 to July 2, 1982 in Lund, Sweden. Since these biennial events have been very successful and important in bringing researchers with varied interests together and in stimulating interdisciplinary communication, so the plans are to continue these on a regular basis with a change in venue for each meeting.