Operations Research is a tool which may be used by the exploration man to help in planning exploration activities and in making decisions. Electronic computers and mechanized data handling may be used in the analyses which are a part of Operations Research. Various types of exploration data which we put on punch cards are readily available for Operations Research studies. Mathematical models of various activities play a large role. They are often built up from data of past experience. Thus, statistics and probability theory are important to the studies. Other techniques commonly associated with Operations Research studies are Linear Programming, Game Theory, Queueing Theory, Monte Carlo, and Search Theory. Operations Research has been defined as quantitative common sense. It is probably the cheapest and one of the more effective of our exploration tools. We use it when we plan optimum control for a geophysical survey. We use it when we analyze the future of a frontier oil province.