This volume is based on papers presented at the 2nd International Conference on Computing Methods in Optimization Problems held in San Remo, Italy, September 9-13, 1968. The Conference was sponsored by the Society of Industrial and Applied Mathematicians (SIAM), with the cooperation of the University of California and the Univer- sity of California and the University of Southern Califor- nia. The Conference focussed on recent advances in com- putational methods for optimization problems in diverse areas including: Computational Aspects of Optimal Control and Trajec- tory Problems; Computational Techniques in Mathematical Programming; Computational Techniques in Optimization Problems in Economics, Metero1ogy, Biomedicine and Related Areas; Identification and Inverse Problems; Computational Aspects of Decoding and Information Retrieval Problems; Pattern Recognition Problems. The Organizing Committee of the Conference consisted of: A. V. Balakrishnan (U. S. A. ) - Chairman L. W. Neustadt (U. S. A. ) - Co-Chairman L. A. Zadeh (U. S. A. ) - Co-Chairman G. Debreu (U. S. A. ) E. Gilbert (U. S. A. ) H. Kelley (U. S. A. ) J. Rosen (U. S. A. ) J. Lions (France) A. Ruberti (Italy) A. Lepschy (Italy) E. Biondi (Italy) G. Marchuk (U. S. S. R. ) N. Moiseev (U. S. S. R. ) B. Pschenichniy (U. S. S. R. ) The Conference was hosted by the Consiglio Naziona1e Delle Ricerche, Italy. CONTENTS G. Arienti and A. Colonelli Daneri: Computation of the Switching Times in Optimal Control Problems of Bang-Bang Type ******************** 1 M.