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Information technology Choi yiu Kuen Lecturers and Tutors Weeks 1 – 4, Choi yiu kuen, [email protected] , ext-27888639 Weeks 5 – 7, Bryan Cheung [email protected] , 27888115 Textbook using Information Technology by Williams and Sawyer, fifth edition, ISBN 0-07-115105-2 Assessment

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lecturers and tutors
Lecturers and Tutors
  • Weeks 1 – 4, Choi yiu kuen, [email protected], ext-27888639
  • Weeks 5 – 7, Bryan Cheung [email protected], 27888115
  • Textbook using Information Technology by Williams and Sawyer, fifth edition, ISBN 0-07-115105-2
assessment
Assessment
  • Continuous Assessment
    • Laboratory practise (20%)
    • Assignment – hardcopy submission and presentation (25%)
  • Time-constraint examination
    • Questions (50%)
using information technology

Using Information Technology

Chapter 1 – Page 1 - 23

Introduction to Information Technology

introduction to information technology mind tools for your future
Introduction to Information TechnologyMind Tools for Your Future
  • 1.1 Infotech Becomes Commonplace: Cellphones, E-Mail, the Internet, & the E-World
  • 1.2 The “All-Purpose Machine”: The Varieties of Computers
  • 1.3 Understanding Your Computer: What If You Custom-Ordered Your Own PC?
  • 1.4 Where is Information Technology Headed?
slide7
“Say goodbye to the personal computing era. Just on the horizon is the era that comes next--the personal information era.” --Kevin Maney, Technology Journalist
  • Pervasive computing trends:
    • Information overload
    • Less use of our brains for memorizing
    • A surge in multi-tasking activity
1 1 infotech becomes commonplace cellphones e mail the internet the e world
1.1 Infotech Becomes Commonplace: Cellphones, E-Mail, the Internet, & the E-World
  • Information technology (“infotech”):
  • Computers - programmable multiuse machines that convert data into information
  • Communications - electromagnetic devices and systems for communicating over long distances
the telephone grows up
The Telephone Grows Up
  • Approximately 1 billion people using cellphones
  • Internet phones are cell phones plus:
    • Email
    • Web services
    • Video
you ve got mail e mail s mass impact
“You’ve Got Mail!” E-Mail’s Mass Impact
  • E-mail (“electronic mail”) -
  • messages transmitted over a network
  • Network - communications system connecting two or more computers
the internet the world wide web the plumbing of cyberspace
The Internet, the World Wide Web, & the “Plumbing of Cyberspace”
  • Cyberspace encompasses the whole wired and wireless world of communications:
  • The Internet - the “mother of all networks”
  • The World Wide Web - multimedia part of Net
the e world welcome to it
The E-World & Welcome to It
  • E-business
  • E-commerce
  • E-government
  • E-learning
  • E-pinions
  • E-tailing

e-service

slide13
1.2 The “All-Purpose Machine”: The Varieties of ComputersAll Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

IBM ASCI White

all computers great small the categories of machines
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

VP2400 mainframe

all computers great small the categories of machines15
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

Sun Microsystems workstation

all computers great small the categories of machines16
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

Sony tower PC

all computers great small the categories of machines17
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

Picture of desktop

all computers great small the categories of machines18
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

Laptop computer

all computers great small the categories of machines19
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers

Personal Digital Assistant

all computers great small the categories of machines20
All Computers, Great & Small: The Categories of Machines
  • Supercomputers
  • Mainframes
  • Workstations
  • Microcomputers
  • Microcontrollers
servers and clients
Servers and clients
  • Server – it is a central computer that holds collections of data & programs for clients
  • Clients - PCs, workstations, & other devices
  • Server + Clients linked together = Client/Server network
slide22
Data is defined as:

The raw facts and figures that are processed into information

Information is defined as:

Data that has been summarized or otherwise manipulated for use in decision making

1.3 Understanding Your Computer: What If You Custom-Ordered Your Own PC?How Computers Work - Concept #1The purpose of a computer is to process data into information.

how computers work concept 2 computers consist of hardware and software
Hardware is:

All the machinery and equipment in a computer system, You could physically see and touch,

Software is:

All the instructions that tell the computer how to perform a task, you could not physically see and touch.

How Computers Work - Concept #2Computers consist of hardware and software.
how computers work concept 3 all computers follow the same five basic operations
How Computers Work - Concept #3All computers follow the same five basic operations.
  • Input – keyboard & mouse
  • Processing
  • Storage
  • Output
  • Communications

Keyboard

Mouse

how computers work concept 3 all computers follow the same four basic operations
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Case or system cabinet

how computers work concept 3 all computers follow the same four basic operations26
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Processor chip, CPU

how computers work concept 3 all computers follow the same four basic operations27
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Memory chips, 64M, 128M and 256M

how computers work concept 3 all computers follow the same four basic operations28
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Motherboard

how computers work concept 3 all computers follow the same four basic operations29
Input

Processing

Storage

Output

Communications

Primary storage (memory)

Computer circuitry that temporarily holds data waiting to be processed

Secondary storage (storage)

The area in the computer where data or information is held permanently

How Computers Work - Concept #3All computers follow the same four basic operations
how computers work concept 3 all computers follow the same four basic operations30
Input

Processing

Storage

Output

Communications

Byte - 1 character of data

Kilobyte - 1000 characters

Megabyte - 1,000,000 characters

Gigabyte - 1 billion characters

Terabyte - 1 trillion characters

How Computers Work - Concept #3All computers follow the same four basic operations
how computers work concept 3 all computers follow the same four basic operations31
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Floppy disk

Zip disk

how computers work concept 3 all computers follow the same four basic operations32
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Hard-disk drive

how computers work concept 3 all computers follow the same four basic operations33
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications
how computers work concept 3 all computers follow the same four basic operations34
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Sound card

how computers work concept 3 all computers follow the same four basic operations35
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Speakers

how computers work concept 3 all computers follow the same four basic operations36
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Video card

how computers work concept 3 all computers follow the same four basic operations37
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Monitor

how computers work concept 3 all computers follow the same four basic operations38
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Printer

how computers work concept 3 all computers follow the same four basic operations39
How Computers Work - Concept #3All computers follow the same four basic operations
  • Input
  • Processing
  • Storage
  • Output
  • Communications

Modem

you still need the software
You still need the software!

Bill Gate

  • System software
  • Helps the computer perform essential operating tasks and enables the application software to run, such as Windows XP, 2000 and 98, Linux
  • and…
you still need the software42
You still need the software!
  • Application software
  • Enables you to perform specific tasks--solve problems, perform work, or entertain yourself such as word, excel, powerpoint, photoshop
1 4 where is information technology headed three directions of computer development
1.4 Where Is Information Technology Headed?Three Directions of Computer Development
  • Miniaturization
    • smaller
  • Speed
    • faster
  • Affordability
    • cheaper

Then (1946)

Now

three directions of communications development
Three Directions of Communications Development
  • Connectivity–connects to other machines
  • Interactivity– two-way communication, a user can respond to information
  • Multimedia – supports text, graphics, video and sound

Auto PC

when computers communications combine convergence portability personalization
When Computers & Communications Combine:Convergence, Portability, & Personalization
  • Convergence –means combining industries through various devices that exchange data in the format used by electronics, entertainment and mass media.
  • Portability –it is so tiny that you could carry
  • Personalization –creation of information tailored to individual
e also stands for ethics
“E” Also Stands for Ethics
  • Speed and scale – huge information can be stored and retrieved.
  • Unpredictability – compared to others, such as electricity, it is less predictable
  • Complexity – computer systems are complex
summary
Summary
  • Data and Information
  • Hardware and Software
  • Computer Scale: supercomputer, mainframe, minicomputer, microcomputer, microcontroller
  • Microcomputer: Input, Output, CPU, memory, hard disk
  • Software: Operation software (Windows XP) and application software (Word)
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