He createdBoolean algebra. This is one of thebases of modern-daycomputer science. Other people, likeAugustus De Morgan andCharles Peirce, refined and completed his work. In their times, very few people knew of the work those mathematicians had done.Boolean algebra was rediscovered byClaude Shannon about 75 years after Boole's death. In his doctoral thesis, Shannon showed that boolean algebra was useful. It could simplify the design of electric switches and relays (like those that were used in the telephone switchboards of the time). Shannon also showed that such switches could solve boolean algebra problems. All modern-day digital circuits (mainlycomputers) use such algebra to solve problems.
