This volume contains the collected papers of the NATO Advanced Research Workshop on neurocomputing held in Les Arcs in February 1989. Various fields in neurocomputing are covered, including: - new or improved neural network algorithms: product units, recurrent multilayer networks, Boltzmann machines, Kohonen maps, growth algorithms; - topics in neural architectures: VLSI circuits, VLSI neurons, dedicated processors; - applications in speech processing: coding, link with hidden Markov Models (HMM), recognition, compression; - applications in image processing: recognition of digits, wind maps, mammographic images, compression; - models in neurobiology: cortical columns, posture, movement coordination. The book can be read at various levels. Newcomers will find in it a useful introduction to the field through the major papers, by leading scientists, and the collected bibliography at the end of the volume. Specialists will learn about some of the more advanced applications, architectures, chip designs and new algorithms. The book will interest all neural network scientists who wish to know what is happening in Europe.