Introduction to computers
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CS2211. Introduction To Computers. Course Objective. Become familiar with the basic concepts of Information Technology Computer and networks. Identify the components of Computer.

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Introduction To Computers

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Introduction to computers


Introduction To Computers

Course objective

Course Objective

  • Become familiar with the basic concepts of Information Technology Computer and networks.

  • Identify the components of Computer.

  • Identify computer networks, types, its components, its benefits, disadvantages and to differentiate between different types.

  • Identify computer viruses their importance, how they work, types and methods of prevention.

  • Develop the skills to use the computer.

  • Practical application on the use of common operating system Windows.

  • Practical application of the use of office applications (MS Word, MS Excel, MS PowerPoint, MS Access (

  • Practical application on the use of the internet browser (Internet Explorer) and some important Internet applications.



How do i get high scores in this course

How do I get high scores in this Course?

  • In the Lecture

    know the important things in the lecture.

    Ask if you do not understand.

  • After Lecture

    Read lecture, apply practical part.

    Reference: Book & CS2211 Blog:



The Computer and The Software Packages, Dr. Bilal Al Zoa’aby and others, 2011, V.9

الحاسوب والبرمجيات الجاهزة ، د. محمد بلال الزعبي و آخرون ، الطبعة التاسعه ، دار وائل للنشر ،2011.

Course introduction to computers

Lecture: 1

  • Chapter1: Introduction To Computers

Course: Introduction To Computers



  • What is Computer?

  • Computer Components

  • What is IT?

  • Computer Types

  • Parts of a Computer

What is computer

What is Computer?

Introduction to computers

What is Computer?

  • It is an electronic machine made of separate component that are connected together and controlled by commands.

  • Computers perform three main operations:

    • Receive input (Data).

    • Process data to information.

    • Produce output (Information).

What is computer1

What is Computer?





Computer components

Computer Components

Introduction to computers

Computer Components

  • Hardware:

    Physical components ex.(Screen, keyboard, ..etc).

  • Software:

    Set of instructions that tells the computer what to do and how ex.(word, games, ..etc).

    3. User:

    A person who uses the software on the computer.

What is it

What is IT?

Introduction to computers

Information Technology (IT)

  • A set of tools that are used to: receive, process, store, print and transmit information in an electronic form through computers.

  • Forms can be: text, sound, picture or video.

Computer types

Computer Types

Introduction to computers

  • 1) Super Computers:

    • High capacity, extremely fast.

    • Cost millions of dollars.

    • Used for research, weather forecasting, aircraft design ..etc.

Introduction to computers

2) Mainframes:

  • High speed, powerful, large storage, Room size.

  • Service hundred of users.

  • Used in banks, government departments, large organizations.

  • Connected to a large number of terminal that can be:

    • Dumb terminal: can not operate on their own.

    • Intelligent terminal: have processing power (receive, process, produce).

Introduction to computers

  • 3) Mini Computers:

    • Do the same job as a mainframe but in a smaller scale.

    • Size of a File cabinet.

    • Used in medium-sized companies ex. (universities)

      4) PersonalComputer (PC):

    • Small, can set on a desk, not expensive, popular.

    • PC’s are manufactured under different names: IBM, Macintosh.

Introduction to computers

5) Laptops:

  • Briefcase-sized.

  • Portable.

  • Powerful as PC but More expensive.

    6) Palmtop:

  • Hand-held, called (notepad).

  • Small screen and keyboard.

  • Cheap.

  • Ex. PDA

Introduction to computers

7) Network Computers:

  • Server:

    • Large PC-type.

    • Connected to smaller PCs called (clients)

Parts of a computer

Parts of a Computer

Introduction to computers

1) System Case or CPU Box:

  • This unit contains the main parts inside it.

  • Tow types: Tower, Desktop.

Introduction to computers

  • 2) Input Devices:

    • The devices that allows people to put data into the computer.

    • Ex. Keyboard, mouse.

  • 3) Output Devices:

    • The devices that translate the information processed by the computer in a form that human can understand.

    • Ex. Monitor

Introduction to computers

  • 4) Peripherals

    • Any pieces of hardware that is connected to a computer to improve its performance.

    • Ex. Scanner, Printer, Modem

Introduction to computers

And when we open the case!

Introduction to computers

System Case (CPU Box)


  • The main circuit board in the system unit, carries the (CPU, memory,..etc).

    Power supply:

  • Provides the electricity that the computer need.

Introduction to computers

System Case (CPU Box)


  • Can be directly connected to the motherboard or on a sockets on the motherboard.

    Disk Driver:

  • Device that can read/writes from/on the hard disk or floppy disk.

    Devices Controller:

  • Circuit boards that allow your CPU work with different kinds of peripheral devices.

Introduction to computers

System Case (CPU Box)


  • Sockets outside the system unit.

  • Connects different devices with your PC.

  • Types:

    • Serial Port: moves one bit at a time

    • Parallel Port: moves a group of bits at once.

    • SCSI Port : transferring data at high speed for up to 15 devices.

    • USB Port: transferring data at high speed for up to 127 devices.

    • Plugs that connect the keyboard and mouse.

Introduction to computers

System Case (CPU Box)

Expansion Slots:

  • Sockets on the motherboard into which you can plug expansion boards.

  • The objective from it is possibility add some terminals then produce the PC power.

  • Ex. Graphical Adapter, Sound Card

Introduction to computers

System Case (CPU Box)

System Clock:

  • Basic part of a computer, connected directly with the CPU.

  • Controls the TIME performing all the operations within a computer.

  • Uses a fixed vibration from a quartz crystal to deliver a steady stream of digital pulses to the CPU.

  • Help speed system clock in determining the speed of implementation of computer instructions.

  • Speed measured by number of beats per second ( frequency unit called Hertz).

  • Therefore CPU processing speeds are expresses in megahertz (Megahertz).

    LED Display:

  • A small light source that is used to indicate that the PC is switch on/off.

Thank you for attention

Thank you forAttention

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