Computer concept

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
2

What is Computer?
• an electronic device that manipulates
information or data.
• has the ability to store, retrieve, and process
data.
3

Use of a computer
• type documents
• send email
• browse the Web
• handle spreadsheets
• Accounting
• database management
• Presentations
• games
4

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
5

Figure: Computer Motherboard
6

Figure: Microsoft Office Word
7

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.
8

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
10

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
12

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
14

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
16

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
17

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.
20

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?
21

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.
22

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.
23

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
24

Figure: First Generation Computer
ENIAC using Vacuum Tubes
25

Fig: Second Generation computer
26

Third Generation Computer IBM-360
using Integrated Circuits
27

Fourth Generation Computer using
Microprocessors
28

Computer concept

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