The Central Processing Unit (CPU), is the primary component of a computer and the component that carries out the majority of the computations. It is often referred to as the “brain” of a computer as it carries out all of the instructions that the user gives it. The CPU carries out its computations by accessing memory.
Memory is a component that stores data and instructions. It is capable of retaining data when the computer is powered off and it is also used to store data during the normal operations of the computer. Memory is composed of two different types of memory - short-term memory (RAM) and long-term memory (storage).
The CPU stores most of its computations on RAM. RAM is a type of computer memory that is made up of tiny memory chips. RAM allows the CPU to access data quickly and can be used to store instructions and data temporarily during the course of computations. RAM also has the benefit of being able to retain its data even when the power supply is turned off.
Data and instructions that need to be stored for longer periods of time are stored on storage. Storage is used for programs, files, documents and other data that need to be preserved even when the computer is powered off. Storage typically has a much larger capacity than RAM, with storage capacities ranging from a few gigabytes to multiple terabytes. Types of storage include Hard Disk Drives, Solid State Drives, USB Drives, optical disks, and network storage solutions.
Finally, the CPU can also store its computations in its own registers. Registers are small, fast memory locations within the CPU. They can be used to temporarily store values and instructions used during a specific computations. When the CPU needs to store a value, it stores it in one of the internal registers until it is no longer needed.
In summary, the CPU stores its computations using a combination of RAM, storage and registers. RAM is used for short-term storage and contains items that need to be accessed quickly. Storage is used for long-term storage and holds files, programs and data that need to be preserved when the computer is powered off. Finally, registers are used to store values and instructions used during the course of a computation.