Different Types of Memory

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Keywords 🗝️

register, cache, RAM, ROM, CPU, memory, primary memory, volatile, non‑volatile, start‑up instructions, operating speed, access time.

Summary 📝

• Computers use four main kinds of memory: registers, cache, RAM and ROM

• Registers are the fastest and smallest memory inside the CPU, used to hold data and addresses while it works. 

• Cache is very small and fast memory close to the CPU, storing data used often to speed up tasks.

• RAM (Random Access Memory) holds programs and data in current use; it is much larger than cache but slower.

• ROM (Read‑Only Memory) stores permanent start‑up instructions that the computer needs every time it switches on.

• Cache and registers help the CPU work quickly by reducing the time needed to access RAM.