This book constitutes the refereed proceedings of the 7th Italian Conference on Theoretical Computer Science, ICTCS 2001, held in Torino, Italy in October 2001.The 25 revised full papers presented together with two invited papers were carefully reviewed and selected from 45 submissions. The papers are organized in topical sections on lambda calculus and types, algorithms and data structures, new computing paradigms, formal languages, objects and mobility, computational complexitiy, security, and logics and logic programming.