The document describes designing a full adder circuit that provides a sum and carry output. It contains a block diagram, truth table, and logical expressions for a full adder. A full adder takes three binary inputs (A, B, C) and produces a sum and carry output based on the inputs. The sum is calculated as A'B'C + A'BC' + AB'C' + ABC and the carry is calculated as A'BC + AB'C + ABC' + ABC.