The term CPU Memory is composed of two components: ROM (3 letters) and CPU. ROM stands for Read-Only Memory, which is a type of non-volatile memory used in computers and other electronic devices. It stores data that cannot be changed or modified, such as the computer's startup instructions. CPU stands for Central Processing Unit, which is the main component of a computer system that carries out instructions. It is responsible for executing programs and performing calculations. Together, ROM and CPU Memory form the basis of a computer's operations.