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1 Computers—Storage
and Memory Device
Chapter Profile
Data and Information
Memory
Measuring the Computer’s Memory
When you were a child, you learned about alphabets and numbers. Do you still
remember those? How? This is because those were stored in your memory. Just like
human memory, computers also have memory to store all the data and instructions
for performing various tasks.
DATA AND INFORMATION
In your daily life, you come across a lot of facts and figures in the form of numbers,
images, etc. These are called data. You can say that a collection of raw and
unorganised facts is known as data. When you organise the data and provide a
specific context, it is called information.
MEMORY
The data and instructions that are entered into the computer using input devices are
stored inside the memory of computer. There are two types of computer memory:
1. Primary Memory
2. Secondary Memory
Primary Memory
This is the main memory of the computer. The CPU can directly access this memory.
It is fixed on the motherboard of the computer.
The primary memory is further divided into two types:
1. Random Access Memory (RAM)
2. Read-only Memory (ROM)
Computers—Storage and Memory Device 7

