The document discusses Boolean algebra, which covers operations that can be performed on binary digits (0s and 1s). It defines Boolean algebra as comprising a set of elements, binary operators for Boolean sum and product, and unary operations. The document outlines the axioms of Boolean algebra, including closure, commutativity, associativity, identity, and distributive properties. It notes that the sets {0,1} and operators AND, OR, and NOT satisfy the axioms of Boolean algebra. The document also discusses Boolean functions, expressions, logic gates, duality, De Morgan's theorem, and useful laws and theorems of Boolean algebra.