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01
02 COMPUTER MEMORY
Your Aim
to learn about:
Memory Measuring the Computer’s Memory
When you were a child, you were taught about alphabet and numbers. Do you still
remember it? How? This is so because these were stored in your memory. Just like
human memory, computers also have memory to store all the data and instructions
for performing various tasks.
MEMORY
The data and instructions that are entered into the computer using input devices
are stored inside the memory. There are two types of memory: Primary memory
and Secondary memory.
Primary Memory
This is the main memory of the computer. CPU can directly access this memory. It is
fixed on the motherboard of the computer. Primary memory is further divided into
two types: Random Access Memory (RAM) and Read Only Memory (ROM).
Random Access Memory (RAM)
RAM is a temporary memory. The information stored in this
memory is lost when the computer is turned OFF. That’s why it
is also called volatile memory.
RAM
Read Only Memory (ROM)
Information stored in ROM is permanent in nature, i.e., it
holds the data even if the system is switched OFF. It holds the
starting instructions that are required to start a computer. It is
ROM
also called non-volatile memory.
Computer Memory 13

