Boolean logics were first invented in the 19th century by George Boole, an english mathematician, who spent his lifetime in relative obscurity, writing about his discoveris in the field of mathematical logics. These discoveries, enhanced by the work of his successors, continued to be encased in the field of theoretical mathematics, until Boolean alegebra was found to help solve problems in

. electromechanical relay curcuits, which were used in telephone rerouting systems at that time. From then onwards, Boolean algebra has been used as the basis in all modern computers. When you type an internet query using the word "and", you're using Boole's logics !