Microcode is a term that refers to a low-level software program that manages the microprocessor's behavior. Also known as firmware, it is a type of programming code that controls the hardware components of a computer system. There are synonyms for microcode that are commonly used in the computer industry, such as system firmware, machine language, low-level code, microprogram, and control store. These synonyms are used to describe the same concept of a program written in low-level code that is built into the hardware of a computer system to manage its processing. Understanding these synonyms is essential for individuals who work in the field of computer engineering and programming.