This book is the third official archival publication devoted to RoboCup and documents the achievements presented at the Third Robot World Cup Soccer Games and Conferences, Robo-Cup-99, held in Stockholm, Sweden in July/August 1999. The book presents the following parts - Introductory overview and survey - Research papers of the champion teams and scientific award winners - Technical papers presented at the RoboCup-99 Workshop - Team description of a large number of participating teams. This book is mandatory reading for the rapidly growing RoboCup community as well as a valuable source or reference and inspiration for R&D professionals interested in multi-agent systems, distributed artificial intelligence, and intelligent robotics.Overview of RoboCup-99.- Overview of RoboCup-99.- Champion Teams.- The CMUnited-99 Champion Simulator Team.- Big Red: The Cornell Small League Robot Soccer Team.- Middle Sized Soccer Robots: ARVAND.- Vision Based Behavior Strategy to Play Soccer with Legged Robots.- Scientific Challenge Award Papers.- Automated Assistants to Aid Humans in Understanding Team Behaviors.- LogMonitor: From Players Action Analysis to Collaboration Analysis and Advice on Formation.- A Statistical Perspective on the RoboCup Simulator League: Progress and Prospects.- Technical Papers.- Real-time Color Detection System using Custom LSI for High-Speed Machine Vision.- A Segmentation System for Soccer Robot Based on Neural Networks.- Practical Camera and Colour Calibration for Large Rooms.- Path Tracking Control of Non-holonomic Car-Like Robot with Reinforcement Learning.- Fast Image Segmentation, Object Recognition and Localization in a RoboCup Scenario.- Using Hierarchical Dynamical Systems to Control Reactive Behavior.- Heterogeneity and On-Board Control in the Small Robots League.- The Body, the Mind or the Eye, first?.- Motion Control in Dynamic Multi-Robot Environments.- Behavior Engineering with Dual Dynamicsl“<