This document discusses information and communication technology (ICT) and introduces concepts related to data and how it is stored and processed by computers. It defines data as unorganized raw information like numbers, letters, and symbols. Data is represented digitally using binary numbers of 1s and 0s and is stored in bytes and larger units like megabytes and gigabytes. Different types of data like text, images, sound, and video are represented and stored digitally.

1. Information & Communication
Technology (ICT)
Introduction To Information
Technology
DIT Part 1
Lecture 4
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2. Data
• Information in raw or unorganized form
Such as:
alphabets
numbers
or symbols
that refer to, or represent, conditions, ideas, or
objects.
• Data is limitless and present everywhere in the
universe.
• See also information and knowledge.
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3. Data
• Symbols or signals that are input, stored, and
processed by a computer, for output as usable
information.
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4. How Data is Stored
• Computers represent data,
Including:
Video
Images
sounds
and text,
The binary values using patterns of just two
numbers: 1 and 0.
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5. How Data is Stored
• A bit is the smallest unit of data, and
represents just a single value.
• A byte is eight binary digits long.
• Storage and memory is measured in
megabytes and gigabytes.
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6. Data Types
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7. Data Types
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8. Data Types
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9. Assignment
– How Many Ways to Collect Data.