Page 15 - Computer - 4

2 2 Computer Memory
Computer Memory

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. This is possible because of the human

brain’s memory. A computer, too, has memory where it
stores data and instructions.
Computer memory is not the same as human memory.

Humans forget things with time; however, computers can
keep data stored in their memory for an extended period of time. Human memory
is capable of storing not only information but also emotions and related notions.
Computer memory stores only data and information. The relationship between

different data is constructed on the basis of files prepared to share the data.
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 an electronic machine. It 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.

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