Artificial intelligence (AI) has existed formally as a field of science and technology for over thirty years. 109634808801200264Nevertheless, it has no precise definition due to it's diversity. Over the years Al has developed into three principal branches: expert systems, natural language communication, and robotics. Expert systems (ES) among the three branches is currently attracting much attention and is of most interest to many professionals as well as organizations. However, the development of expert systems—the computer programs that emulate the thinking processes of human brain in solving problems—is very complex and extremely costly. Although the current applications of ES are mainly is space exploration, it should be noted that some of the greatest opportunities for expert systems in the hospitality industry lie in small, routine, everyday tasks like departmental budget analysis, shift scheduling, credit verification, and room assignment.