Expert system is a practical application part of artificial intelligence and can be generally described as a computer-based system designed to simulate the knowledge and reasoning of a human expert, and to make that knowledge conveniently available to other people in a useful way. Expert systems consist of three major components, a knowledge base, inference engine and user interface. In this paper, it is aimed to construct a prototype system to design the horizontal-typed pressure vessel.
To do this, a representitive artificial programming language-Turbo Prolog is employed. To construct this system, the knowledge representation was mainly done by production rules as well as "If (condition), then (action)" style and by predicate the logic. It was quite easy to represent knowledge of "If(condition), then (action)" style and various table-like data. Also it was possible to represent the graphics. Though this expert system is small and incomplete, it is possible to expand it to a larger and refined system later.
