jasmeet chap 01 intro to computers

CHAPTER 1

INTRODUCTION TO COMPUTERS

By : Jasmeet Khosa

What is a computer ?

How is computer defined ?

•Electronic device operating under the control of instructions stored in its own memory

Accepts Data Processes Data into Information

Produces and stores results

What is a computer ?

What is the information processing cycle ?• Input• Process• Output• Storage• Communication

The components of a computer ?

What is an input device ?•Hardware used to enter data and instructions.

What is and output device ?• Hardware that conveys information to one or more people.

What is a system Unit ?•Case containing electronic components used to process data.

The components of a computer ?

What are the two main components on the motherboard ?

Central Processing Unit (CPU)

* Also called as processor.

Memory

The components of a computer ?

What is storage?•Holds Data, instructions and information for future use.•The two components of storage are:

Storage Media

Storage Device

The components of a computer ?

Examples of storage media are:

Portable, thin memory cards

Compact Disk (CD)

Hard Disk

USB flash driveFloppy Disk

The components of a computer ?

What is a communications device ?

Hardware components that enables a

computer to send and receive Data,

instructions, and information.

Occurs over cables, telephone lines,

cellular radio network, Satellites, and others transmission media.

ADVANTAGES AND DISADVANTAGES OF USING COMPUTERS ?What is the advantages of using computers ?

Speed

Communications

Storage

Reliability

Consistency

ADVANTAGES AND DISADVANTAGES OF USING COMPUTERS ?What is the disadvantages of using computers ?

Violation of privacy

Impact on Labor Force

Health RisksImpact on

Environment

Network and the internet ?

What is a network ?•Collection of computers and devices connected together.

Communications Device

Enable a connection between computers

One type is a modem

Transmission Media

Cables

Telephone lines

Satellites

Cellular radio

Network and the internet ?

What are the reasons to internet ?

To share

Resources

Hardware devices

Software programs

Information

Data

To save time and money

Network and the internet ?

Why do users access the internet ?

1. Communication2. Information3. Shopping4. Banking and investing5. Classes6. Entertainment

COMPUTER SOFTWARE?

What is a software ?

Consists of a series of

instructions that tells the

computer what to do

Also called a program

COMPUTER SOFTWARE?

What is system software ?• Programs that control or maintain the operations of the computer and its devices.

What is application software ?• Programs that performs that perform specific tasks for users.

What is a programmers ?• Someone who develops applications or system software.

Categories of computers ?

What are the categories of computers ?

Microcomputers

Mobile computers and mobile devices

Midrange Servers

Mainframes

Supercomputers

Embedded Computers

Categories of computers ?

What are the categories of computers ?Under microcomputers there are :

Desktop Laptop Tablet Pc

PDA Palm PC Net book

SERVERS ?

What types of servers are there ?

• Midrange server -Powerful, large computer that supports up to a few thousand computer.

• Mainframe server-Very powerful, expensive computer that supports thousands of computers.

• Supercomputer-The faster, most powerful, most expensive computer. Used for application requiring complex mathematical calculations.

Elements of an information system ?

What are the information system elements ?

Hardware

ProceduresPeople

DataSoftware

Computer applications in society ?

Education Finance Government Healthcare Science Publishing Travel Industry

Question ?

1) Give me few example of who needs and uses

a power computer?

Question ?

• Engineers • Scientists• Architects• Desktop publishers

• Graphic artists

Question ?

2) What are the

few functions of a PDA ?

Question ?

• Calendar• Appointment

book• Address book• Calculator• Notepad