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2 Computer Memory

Pre-Processing
Pre-Processing
• Measuring Computer Memory • Types of Computer Memory

• Secondary Storage Devices • Tertiary Storage Devices

The human brain is capable of learning new things. It can
also store and retrieve previously learned information as

and when needed. A computer, too, has memory where it
stores data and instructions.
Humans forget things with time; however, computers can

keep data stored in their memory for an extended period of
time. Computer memory stores only data and information.

Every computer has some form of memory. The size of a computer’s memory determines
how much data and instructions it can store.

Knowledge Discovery Subject Enrichment

The speed of a computer is linked to the amount of memory it has. The larger the memory
of a computer, the greater is its speed of processing information.

MEASURING COMPUTER MEMORY

A computer is made up of electronic circuits. Each circuit
has two states – ON and OFF. These two states are
represented by two digits – 1 for ON and 0 for OFF. The

digits 1 and 0 are called Binary digits. Each binary digit is
called a Bit or Binary digit. A sequence of eight bits is called a Byte. The Byte is the basic
unit for measuring computer memory. One byte represents a single character or digit.

Let us learn other bigger units of measuring computer memory.

Size Measurement Abbreviation

8 bits is equal to 1 Byte B

1024 B is equal to 1 Kilobyte KB

1024 KB is equal to 1 Megabyte MB

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