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.

What are the two main components on the motherboard ?
Central Processing Unit (CPU)
* Also called as processor.
Memory

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

Examples of storage media are:
Portable, thin memory cards
USB flash drive
Floppy Disk
Compact Disk
(CD)
Hard Disk

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 ?
Reliability
Speed
Communications
Consistency
Storage

ADVANTAGES AND DISADVANTAGES OF USING COMPUTERS ?
What is the disadvantages of using computers ?
Violation of privacy
Impact on Labor Force
Health Risks
Impact on Environment

Network and the internet ?
What is a network ?
Collection of computers and devices connected together.
Communications Device
Transmission Media
Enable a connection between computers
Cables
Satellites
Telephone lines
Cellular radio
One type is a modem

To save time and money
What are the reasons to internet ?
To share
Resources
Information
Hardware devices
Data
Software programs

Why do users access the internet ?
Communication
Information
Shopping
Banking and investing
Classes
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
Palm PC
PDA
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 ?
Data
Hardware
Software
Procedures
People

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

Jasmeet Chap 01 Intro To Computers

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