The correct answer is the memory unit. A microcomputer consists of at least an input unit, an output unit, a microprocessor unit, and a memory unit.Primary storage, or memory, means the space on your hard drive that is briefly used for working space.This usually occurs in a chip.Memory consists of four types of memory chips RAM, ROM, CMOS, and flash. RAM stands for random access memory and ROM stands for read-only memory.These are also called the primary memory of a computer.RAMRAM stands for Random Access Memory and is a type of chip used in primary storage memory.It is also temporary storage, holding software instructions and short-term working memory for the processor.RAM can be increased in most computers by using expandable memory slots.ROMROM (Read Only Memory) refers to a read-only memory chip that cannot be written on or erased by the computer user without special equipment.While using ROM contents are not lost when power to the computer is no longer available.Additional InformationComputer printerA computer printer is a piece of hardware for a computer.It allows a user to print items on paper, such as letters and pictures.Mostly a printer prints under the control of a computer.Many can also work as a copying machine or with a digital camera to print directly without using a computer.StabilizerA voltage stabilizer is needed for the smooth and constant functioning of devices and keeps voltage intact.The main purpose of a voltage stabilizer is to provide constant voltage to a load even during voltage fluctuations.Network topologyNetwork topology is the arrangement of the elements of a communication network.Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial field busses, and computer networks.