Introduction to topological and conformal field theory, H.Verlinde; introduction to matrix model and liouville theory, E.Martinec; some properties of non-critical strings, D.Kutasov; instantons and solitons in heterotic string theory, J.Harvey; introduction to topological and conformal field theory, R.Dijkgraaf; introduction to W Algebras, A.Bilal; string theory in 2 dimensions, I.Klebanov; instantons and solitons in heterotic string theory, C.Callan; integrable models, L.D.Faddeev;Liouville theory and its recent developments, L.Alvarez-Gaume; target space duality symmetries and effective actions of string theory, D.Lust; geometric structures in effective superstring lagrangians, P.Fre; duality invariant effective action for supersymmetries, M.Porrati; transition from critical to non-critical string at high temperatures, C.Kounnas; correlation functions in compactified c=1 quantum gravity, I.Klebanov; the origin of the string equation, C.Gomez; quantization of Sl(2,R) Chern-Simons topological theory, C.Imbimbo; string propagation in a black hole geometry, R.Dijkgraaf; double scaling limit in the O(N) vector model, P.Di Vecchia; singular vectors in virasoro representations, M.Bauer; Schwinger-Dyson equations for 2-matrix model and Wa3 algebra, K.S.Narain; O(N) vector model in the double scaling limit, J.Zinn-Justin.
