The 1983 Cargese Summer Institute on Particles and Fields was organized by the Universite Pierre et Marie Curie, Paris (M. LEVY and J.-L. BASDEVANT), C.E.R.N. (M. JACOB), the Universite Catholique de Louvain (D. SPEISER and J. WEYERS), and the Katholieke Universiteit Leuven (R. GASTMANS). After 1975, 1977, 1979, and 1981, it was the fifth time they joined their efforts for organizing this Summer Insti tute. This school was characterized by simultaneous progress in the theory of elementary particles and by impressive experimental advances. On the theoretical front, one witnessed the new developments in lattice gauge theories, which explore the world of strongly interacting par ticles in a non-perturbative way, and progress in a better understan ding of the unity of all interactions based on supersymmetry. The experimentalists were ~roud to announce the discovery of the interme diate vector bosons; W- and ZO, at C.E.R.N., while physicists working with e+e- colliding beams continued to probe more deeply the validity of the theoretical models of strong, weak and electromagnetic inter actions. We owe many thanks to all those who have made this Summer Insti tute possible! Thanks are due to the Scientific Committee of NATO and its Presi dent for a generous grant and especially to the head of the Advanced Study Institute Program and his collaborators for their constant help and encouragement. We also thank the National Science Foundation (USA) for their financial assistance.

These proceedings contain the lecture notes of the topics covered during the Summer School as well as the contributions from the Workshop. The first week saw discussions on the phenomenological aspects of particle physics, aspects of CP violation, the implications of precision electroweak experiments, new developments of perturbative QCD, physics beyond the standard model, and the implications of the minimal supersymmetric model and its string motivation. The second week of the School was dedicated to more formal aspects of particle physics including quantum groups and quantum spaces, calculations of loops and anomalies using supersymmetric path integrals, a new description of superstrings, integrable models and a review on the quantum mechanics of black holes.

Particle physics seems to be entering a new period of consoli dation. In 1977 when the first summer institute on particles and fields was held at the Banff Center, the standard model of the electro-weak interaction was a promising model more or less con firmed; today it seems quite well-confirmed. QCD was considered as probably the correct theory of strong interactions; today most theo rists take it for granted. What seems to be lacking are computa tional tools and strenuous experimental testing; the major ideas seem to exist. Thus, this is a particularly auspicious time for a review of the status of theoretical and experimental particle physics and field theory. The lectures collected in this volume were presented from August 16 to August 27, 1981 at the Banff Center in Banff, Canada. The unifying theme was gauge fields and the topics covered dealt with electro-weak interactions, Q.C.D., sub-quarks and unified theories. The format of the Institute was as follows: thirteen lecture series of two to four hours each given by S. Brodsky, D. Bryman, M. Chen, S. Coleman, M. Creutz, H. Harari, J. Iliopoulos, C.H. Llewellyn Smith, P. Lepage, D. Perkins and L. Susskind. In addition there were nine seminars (one hour each) given by G. Bodwin, G. Bunce, M.