This volume presents the proceedings of the 18th German Annual Conference on Artificial Intelligence (KI-94), held in Saarbrücken in September 1994. Besides the invited paper "AI approaches towards sensor-based support in road vehicles" by H.-H. Nagel, the book contains 33 full research papers and 12 poster presentations selected from a total of 98 contributions, half of them originating from outside Germany. The papers cover all relevant aspects of AI with a certain focus on knowledge representation and logical foundations of AI; further topics covered are neural network applications, logic programming, natural language, machine learning, and reasoning.