This document provides an overview of register transfer, microoperations, and basic computer organization and design. It defines microoperations as elementary operations performed during one clock pulse on information stored in registers. The organization of a digital computer is specified by the registers it contains, the sequence of microoperations performed, and control functions that initiate operations. Common microoperation types include data transfer, arithmetic, logic, and shift operations. Register transfer language is used to describe sequences of microoperations.