Keynote Address. Technological competition and cooperation (H. Kobayashi). MAN. Traffic engineering for high speed networks (P.J. Kühn). Performance analysis of the CRMA-protocol in high-speed networks (P. Tran-Gia, R. Dittmann). DQDB modeling: problem complexity reduction and solution via Markov chains (M. Conti, E. Gregori, L. Lenzini). Network Performance. An object-oriented approach for quality of service and network performance modeling (J.G. Markopoulos et al.). Performance of connection management policies for a LAN to broadband ISDN gateway (A. Wolisz, M. Walch, R. Ruppelt). Multi-queue Models. A heterogeneous SCAN service polling model with single-message buffer (B.D. Bunday, J. Sztrik, R.B. Tapsir). Analysis of a priority queue with Bernoulli schedules (T. Katayama, Y. Takahashi). ATM Switching Networks. Buffered multistage interconnection networks: simulations results and modelling trials (J. Le Roux). A modular ATM switch for broadband ISDN switching (W.D. Zhong, J. Kaniyil, Y. Onozato). Blocking in asynchronous, buffered banyan networks (P.G. Harrison, A. de C. Pinto). Modeling Computer Systems. Performance analysis of a processor sharing policy with interactive and background jobs (K.K. Leung). Queueing Networks. Probabilistic methods for Jackson networks (G. Fayolle et al.). Estimating response time distributions in queueing networks (A.E. Conway, D.E. O'Brien). Optimal deadlock free buffer allocation in multiple chain blocking networks of queues (I.F. Akyildiz, J. Liebeherr). Asymptotic analysis of closed queueing networks with bottlenecks (Y. Kogan, A. Birman). Performance Evaluation Tools. Concurrent stochastic simulation: Experiments with EcliPSe (V.J. Rego, V.S. Sunderam). ATM Modeling and Analysis. Queueing systems for modelling ATM networks (G. Pujolle, H.G. Perros). Analysis and application of an MMPP/PH/n/m multi-server model (U.R. Krieger, D. Wagner). A method of computation of the consecutive cell loss probability for an individual source in superposed traffic (F.M. Brochin). Cell loss behavior in a statistical multiplexer with bursty input (H. Yamada). Queueing Systems. Exact computation of blocking probabilities in state-dependent multi-facility blocking models (E. Pinsky, A. Conway). Space priority mechanisms with bursty traffic (J. García, O. Casals). Buffer size requirements under longest queue first (H.R. Gail et al.)