The basic game of Nim, of which Dr. Nim plays a variation, is thought to have been played in the Far East, perhaps China, thousands of years ago. It is interesting to realize this simple, but intriguing game has withstood the trials of time and has undoubtedly been played by millions of people over the centuries. E.S.R., Inc. hopes that you will find it interesting and delightful to play Dr. Nim and that you have at least an insight into the workings of computers. Who is Dr. Nim? He is a fascinating, challenging, digital computer, ingeniously designed and simply made, so that all can play against him. Less than a minute is needed to learn the rules of play. If you can count, you can play Dr. Nim. Or, if you wish, you may try to work out the mathematical formulas for beating him at the ancient game of Nim. This game, played for thousands of years, really comes to life with Dr. Nim. The instruction booklet that comes with Dr. Nim not only describes the extremely simple rules of play, but it also presents a detailed write-up of Dr. Nim as a computer. Included are discussions of the mathematics and programming of computers. An intriguing discussion of the philosophy of computers as "Thinking Machines" is included. Dr. Nim was invented by a computer genius. That is why he is so simple to operate and yet so intriguing to play by both young and old. Many variations on the game of Dr. Nim are possible. You can even make Dr. Nim play against himself or you can use Dr. Nim to play against another person. Match your wits against Dr. Nim. He has been fully tested with children and adults. Guaranteed to perform. Guaranteed to please.