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4/7/2012
Learning Objectives
Lecture ONE
Introduction to Computers
Reference: Shelly Cashman, Discovering Computers 2011, Living In Digital World, International Thompson Publishing,
•Define the computer terms. •Describes 5 components of computer. •Discuss advantages and disadvantages using computers. •Distinguish between system software and application software. •Differentiate among types, sizes and function of computer in each categories. Describes computer users. Describes how society uses computers.
About The Computer
Why is a computer so powerful? What does a computer do?
What is a computer?
Chapter1 / slide 4
About The Computer
The Computer System
The electronic, electric & mechanical equipment or physical components that make up a computer
DEFINITION
A Computer is
An electronic machine Control instruction
The series of instruction or programs that tells the hardware how to perform tasks Chapter1 / slide 5 Chapter1 / slide 6
1
4/7/2012
Chapter 1
Introduction to Computers
Tasks Perform By Computer
produces results
The Information Processing Cycle
accept data
manipulate data
INPUT
PROCESS
OUTPUT
store data
link data
STORAGE
Chapter1 / slide 8
Chapter 1
Introduction to Computers
The Components of a Computer
The Characteristics of Computer
WHY IS COMPUTER SO POWERFUL?
INPUT devices Software PROCESS devices
(system unit)
Software
OUTPUT devices
Speed
COMM. devices
Communication Storage Accuracy
GIGO
Software
Reliability
STORAGE devices
Chapter1 / slide 9
Chapter1 / slide 10
The Advantages of Computer
The Advantages of Computer
Speed – computers do everything in fraction of seconds. They can perform complex calculations, recall stored information, transmit information from one location to another, and move objects around a computer screen almost instantaneously. Accuracy/ Consistency– computers carry out activities/ results the same way every time they repeating the same action. Chapter1 / slide 11
Storage– computers can store data with large volume, e.g. 250GB; and keep data for long period of time, e.g. 20 years. Reliability – with speed, consistency, and precise come reliability. You can depend on getting the same result again and again, you can count on computers and communications networks to be available and properly functioning when you need them. Low Failure rate
2
4/7/2012
The Advantages of Computer
Implications: Disadvantages/ Social and Ethical Issues
Communicate– computers can share data with other computer which located around the world or even out of space, using the network connection.
The threat to personal privacy posed by large databases and computer networks The hazards of high-tech crime and the difficulty of keeping data secure The difficulty of defining and protecting intellectual property in an all-digital age The risks of failure of computer systems The threat of automation and the dehumanization of work The abuse of information as a tool of political and economic power The dangers of dependence on complex technology Chapter1 / slide 14
Chapter 1
Computer Literacy & Information Literacy
What is computer literacy?
The Computer Software
To understand uses of computer and knowledge of computers
Why is information literacy?
Computer Software
Chapter1 / slide 16
Knows how to gather information, evaluate this information, and make an informed decision Chapter1 / slide 15
The Software
The Software
Operating System (OS) Utility Programs User Interface
Chapter1 / slide 17
Packaged Software Custom Software Freeware Public-domain Software Shareware Open Source Software Chapter1 / slide 18
3
4/7/2012
Software Forms
Software Forms
Packaged S/W is a mass produced, copyrighted retail software that meets the needs of a variety users. Custom S/W performs functions specific to a Business or industry. Open Source...
Learning Objectives
Lecture ONE
Introduction to Computers
Reference: Shelly Cashman, Discovering Computers 2011, Living In Digital World, International Thompson Publishing,
•Define the computer terms. •Describes 5 components of computer. •Discuss advantages and disadvantages using computers. •Distinguish between system software and application software. •Differentiate among types, sizes and function of computer in each categories. Describes computer users. Describes how society uses computers.
About The Computer
Why is a computer so powerful? What does a computer do?
What is a computer?
Chapter1 / slide 4
About The Computer
The Computer System
The electronic, electric & mechanical equipment or physical components that make up a computer
DEFINITION
A Computer is
An electronic machine Control instruction
The series of instruction or programs that tells the hardware how to perform tasks Chapter1 / slide 5 Chapter1 / slide 6
1
4/7/2012
Chapter 1
Introduction to Computers
Tasks Perform By Computer
produces results
The Information Processing Cycle
accept data
manipulate data
INPUT
PROCESS
OUTPUT
store data
link data
STORAGE
Chapter1 / slide 8
Chapter 1
Introduction to Computers
The Components of a Computer
The Characteristics of Computer
WHY IS COMPUTER SO POWERFUL?
INPUT devices Software PROCESS devices
(system unit)
Software
OUTPUT devices
Speed
COMM. devices
Communication Storage Accuracy
GIGO
Software
Reliability
STORAGE devices
Chapter1 / slide 9
Chapter1 / slide 10
The Advantages of Computer
The Advantages of Computer
Speed – computers do everything in fraction of seconds. They can perform complex calculations, recall stored information, transmit information from one location to another, and move objects around a computer screen almost instantaneously. Accuracy/ Consistency– computers carry out activities/ results the same way every time they repeating the same action. Chapter1 / slide 11
Storage– computers can store data with large volume, e.g. 250GB; and keep data for long period of time, e.g. 20 years. Reliability – with speed, consistency, and precise come reliability. You can depend on getting the same result again and again, you can count on computers and communications networks to be available and properly functioning when you need them. Low Failure rate
2
4/7/2012
The Advantages of Computer
Implications: Disadvantages/ Social and Ethical Issues
Communicate– computers can share data with other computer which located around the world or even out of space, using the network connection.
The threat to personal privacy posed by large databases and computer networks The hazards of high-tech crime and the difficulty of keeping data secure The difficulty of defining and protecting intellectual property in an all-digital age The risks of failure of computer systems The threat of automation and the dehumanization of work The abuse of information as a tool of political and economic power The dangers of dependence on complex technology Chapter1 / slide 14
Chapter 1
Computer Literacy & Information Literacy
What is computer literacy?
The Computer Software
To understand uses of computer and knowledge of computers
Why is information literacy?
Computer Software
Chapter1 / slide 16
Knows how to gather information, evaluate this information, and make an informed decision Chapter1 / slide 15
The Software
The Software
Operating System (OS) Utility Programs User Interface
Chapter1 / slide 17
Packaged Software Custom Software Freeware Public-domain Software Shareware Open Source Software Chapter1 / slide 18
3
4/7/2012
Software Forms
Software Forms
Packaged S/W is a mass produced, copyrighted retail software that meets the needs of a variety users. Custom S/W performs functions specific to a Business or industry. Open Source...
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