The document discusses different types of computers and their components. It begins by defining a computer as an electronic device that can store, retrieve, and process data. It then explains that computers have two basic parts: hardware, the physical structure, and software, a set of instructions. It goes on to describe different types of computers including desktop computers for regular use at home or work, laptop computers which are portable, server computers which manage network resources, and tablet computers which use a touchscreen instead of keyboard. It also distinguishes between PCs, which most commonly use Windows, and Macs, which are made by Apple and use their Mac OS. The document concludes by covering the five generations of computers from the first using vacuum

1. Computer Concept
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2. Chapter Content
• Knowledge about computer
• Knowledge about hardware and software
• Knowledge about different types of computer
• Knowledge about first generation, second
generation, third generation, fourth
generation and fifth generation computer
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3. What is Computer?
• an electronic device that manipulates
information or data.
• has the ability to store, retrieve, and process
data.
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4. Use of a computer
• type documents
• send email
• browse the Web
• handle spreadsheets
• Accounting
• database management
• Presentations
• games
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5. Basic parts of Computer
All types of computers consist of two basic parts:
• Hardware - physical structure, such as the
computer monitor or keyboard
• Software - set of instructions that tells the
hardware what to do. Example: web browsers,
games, and word processors such as Microsoft
Word
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6. Figure: Computer Motherboard
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7. Figure: Microsoft Office Word
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8. Different types of computers
1.Desktop computers:
– Use at work, home, school, or the library
– small, medium, or large in style, and they usually sit
on a desk
– Once you add a monitor, mouse, and keyboard, you
have what is typically known as a desktop computer
– easy to upgrade and expand or add new parts
– desktop computer is priced lower
– Some desktop computers have a built-in monitor to
save space. These are often called all-in-one desktop
computers.
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9. Figure: Desktop Computer
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10. Different types of computers(cont.)
2.Laptop computers:
– Laptops are battery- or AC-powered personal
computers
– more portable than desktop computers
– may not be able to upgrade them as easily as a
desktop
– it's usually possible to add more RAM or a larger
hard drive
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11. Figure: Laptop Computer
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12. Different types of computers(cont.)
3.Servers:
– serves up information to other computers on a
network
– look like a regular desktop computer, or it can be
much larger
– WebPages are stored
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13. Figure: Servers
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14. 4. Tablet computers
– use a touch-sensitive screen for typing and
navigation
– don't require a keyboard or mouse
– more portable than laptops
– The iPad is an example of a tablet computer
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15. Figure: Tablet Computer
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16. PCs and Macs
Personal computers come in two main styles:
• PC:
– began with the original IBM PC that was
introduced in 1981
– this is the most common type of personal
computer today
– typically includes the Microsoft Windows
operating system
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17. PCs and Macs (Cont.)
• Mac:
– Macintosh computer was introduced in 1984
– first widely sold personal computer with a
Graphical User Interface
– made by one company, Apple Inc.
– use the Mac OS operating system
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18. Figure: Personal Computer
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19. Figure: Mac
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20. Summary
– The computer – electronic device that can store, retrieve, and
process data.
– Hardware – physical structure of the computer.
– Software – set of instructions that tell the hardware what to do.
– Desktop computers – personal computer designed for regular
use at a single location on or near a desk or table due to its size and
power requirements.
– Laptop computers - a computer that is portable and suitable for
use while travelling.
– Server Computers - used to manage network resources.
– Tablet computers - small portable computer that accepts input
directly on to its screen rather than via a keyboard or mouse.
– PCs – personal computer began with the original IBM PC that was
introduced in 1981. It typically includes the Microsoft Windows
operating system.
– Macs - Macintosh computer introduced in 1984. Made by one
company Apple Inc., and they almost always use the Mac OS X
operating system.
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21. Exercise 1.1
• What is computer?
• Define software and hardware with two
examples.
• Write down about the basic parts of a computer.
• What is the difference between desktop and
laptop computer.
• Explain about different types of a computer.
• Write down about PCs and Macs computer.
• What is server computer?
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22. Critical Thinking 1.1
1. List the activities you perform using a computer.
2. Which type of computer do you think is the best
for you: a desktop computer, a laptop, a tablet, or
a phone? Give a reason for your answer.
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23. Generations of Computer
• the state of improvement in the product
development process
• miniaturization, speed, power, and computer
memory has proportionally increased
• affect the way we live, work and play
• fundamentally changed the way computers
operate, resulting in increasingly smaller,
cheaper and more powerful and more
efficient and reliable devices.
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24. Generations of Computer
1. First Generation - 1940-1956: Vacuum Tubes
2. Second Generation - 1956-1963: Transistors
3. Third Generation - 1964-1971: Integrated Circuits
4. Fourth Generation - 1971-Present: Microprocessors
5. Fifth Generation - Present and Beyond: Artificial
Intelligence
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25. Figure: First Generation Computer
ENIAC using Vacuum Tubes
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26. Fig: Second Generation computer
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27. Third Generation Computer IBM-360
using Integrated Circuits
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28. Fourth Generation Computer using
Microprocessors
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29. Fifth Generation
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