What is Computer? - PowerPoint PPT Presentation

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What is Computer?

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Title: Slide 1 Author: Mete Yaman Last modified by: Mete Yaman Created Date: 10/7/2003 11:00:00 AM Document presentation format: On-screen Show Company – PowerPoint PPT presentation

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Title: What is Computer?


1
What is Computer?
A computer is a machine that can be programmed to
process data (input) into useful information
(output). A computer system comprises four main
aspects of data handling input, processing,
output and storage.
2
The Nature of Computers
  • Speed essential to our fast-paced society
  • Reliability extremely reliable / human errors
  • Storage Capability tremendous amounts of data
  • Productivity doing better and faster jobs
  • Decision Making need to take into account
    financial, geographical and logistical factors
  • Cost Reduction holds down teh costs of labor,
    energy and paperwork

3
Where Computers Are Used?
  • Education
  • Graphics
  • Retailing
  • Energy to locate oil, natural gas, coal
  • Law Enforcement fingerprint, DNA
  • Transportation car technologies, air traffic
  • Money
  • Agriculture
  • Government
  • Home
  • Healt and Medicine
  • Robotics
  • The Human Connection
  • The Sciences
  • Connectivity
  • Training

4
Computer System
5
Front of the Computer
  • CD-ROM Drive
  • Floppy Drive
  • Keyboard
  • Monitor
  • Mouse

6
Inside the Computer
  • CD-ROM
  • CPU
  • Expansion Slots
  • Floppy drive
  • Hard disk
  • Memory chip
  • Motherboard
  • Power Supply

7
Back of the Computer
  • Cooling Fan
  • Power Supply
  • Keyboard Connector
  • Mouse Connector
  • Parallel Printer Port
  • Video Connector
  • Mouse Connector
  • Parallel Printer Port
  • Video Connector

8
Microprocessor
  • Brain of the computer
  • Current chips for PC
  • Intel (Celeron, Pentium III, Pentium IV and
    Centrino)
  • AMD (K-6 and Athlon)
  • Which do I buy?
  • Pentium IV or Athlon for graphic intensive
    programs
  • K-6 or Celeron for business and Internet browsing

9
Auxiliary Storage
  • CD-ROM
  • Tape Backup
  • Hard disk
  • Zip Drive
  • Floppy Disks
  • DVD

10
Auxiliary Storage (Permanent)
  • Floppy Disk
  • Most common is 1.44Mb
  • LS-120 disk is 120Mb
  • High Capacity Removable Storage
  • Zip disks (100 or 250Mb)
  • Jaz Disks (1 or 2Gb)
  • Hard (Fixed) Disk
  • Most common are 10 80Gb

11
Auxiliary Storage (Continued)
  • CD-ROM (800Mb)
  • Recordable devices also available
  • DVD drives (4.7Gb-17Gb)
  • ROM and RAM
  • Higher capacity than CD
  • Tape Units
  • Used for large, unattended back-ups

12
Internal Memory (RAM)
  • Temporary (erased when power turned off)
  • Measured in bytes
  • 1 Byte 1 character (8 bits)
  • 1 Kilobyte 210 (1,000 bytes)
  • 1 Megabyte 220 (1,000,000 bytes)
  • 1 Gigabyte 230 (1,000,000,000 bytes)
  • Need 64 - 1024Mb of RAM
  • Want to keep multiple programs data files in
    memory
  • Graphic intensive programs demand a lot of memory

13
Input and Output Units
  • Keyboard
  • Mouse
  • Trackball
  • Scanner
  • Joystick
  • Pen
  • Ink Jet
  • B/W or color
  • Smears
  • Lasers
  • Highest quality output

14
Modems/Network Cards
  • Fax/Modem
  • 56Kbps/V.90
  • Cable Modem
  • Uses TV cable
  • DSL Modem
  • Voice and Data on same line
  • Network Cards

15
Additional Devices
  • Multimedia
  • CD ROM or DVD
  • Sound Card
  • Speakers
  • Other Devices
  • Scanner
  • Camera

16
Software
  • System
  • MS-DOS
  • Mac OS
  • Unix
  • Linux
  • Windows
  • Application
  • Word Processing
  • Spreadsheets
  • Presentation
  • Games
  • Antivirus
  • Others

17
Classification of Computers
  • Personal Computers
  • Notebook Computers lightweight and portable
  • Handheld Computers personal digital assistant
    (PDA)
  • Midrange Computers design to serve the needs of
    medium sized organizations
  • Mainframes processing data at very high speed
  • Supercomputers process trillions of
    instructions per second

18
Introduction to Windows
19
Evolution of Windows
  • Windows 3.1
  • First widely used successful version of Windows
  • Replaced MS-DOS
  • Windows 95
  • Introduced Start button, taskbar for
    multitasking, and My Computer for easier file
    management
  • Windows NT
  • Intended for business computing
  • Increased reliability and security

20
Evolution of Windows (Continued)
  • Windows 98
  • Active desktop displays Web content
  • Enables Web conventions on the desktop
  • Windows 2000
  • Security of NT with Windows 98 Interface
  • Windows 2000 Professional and Windows 2000 Server
  • Windows Me (Millennium Edition)
  • Successor to Windows 98 for home computing

21
The Windows Desktop
22
Anatomy of a Window
  • Title bar with Min, Max or Restore, and Close
    buttons
  • Menu bar, Toolbar, and Address bar
  • Status bar and Scroll bars

23
The Devices on a System
  • Drive A is always a floppy disk
  • Drive B is a second floppy disk (obsolete)
  • Drive C is always a fixed disk
  • Drives D, E, are variable
  • CD ROM
  • Zip drive or removable media
  • Network drives

24
Pull-down Menus
  • Pull-down menu
  • Dimmed command
  • Ellipsis
  • Check
  • Bullet
  • Arrowhead
  • Submenu

25
Dialog Boxes
  • Tabbed dialog box
  • Option buttons
  • Check box
  • Text box
  • Spin button
  • Command buttons

26
Dialog Boxes continued
  • Command buttons
  • Open List Box
  • Scroll bar
  • List box
  • Tabbed dialog box
  • Help button ?
  • Cancel button
  • OK button

27
Moving and Sizing a Window
  • To Move a Window
  • Click and drag the title bar
  • To Size a Window
  • Click and drag a corner to change the length and
    width in proportion with one another
  • Click and drag a border to change just the length
    or the width

28
Formatting a Floppy
  • Disk capacity
  • 720Kb
  • 1.44Mb
  • Types of formatting
  • Quick (erase)
  • Full
  • Label

29
File Management
  • My Computer
  • Simpler and less sophisticated
  • Can result in multiple open windows at one time
  • Windows Explorer
  • Hierarchical view on left
  • Contents of the selected folder on the right
  • Multiple views available for both
  • Small icons, Large icons, List, and Details view

30
Windows Explorer
  • Folder
  • Expanded
  • Collapsed
  • Files
  • Program file
  • Data file
  • File names
  • Name
  • Extension (type)

31
Moving and Copying Files
  • Moving Files
  • Click and drag to a different folder on the same
    drive
  • Cut and Paste
  • Shortcut Menu
  • Copying Files
  • Click and drag from one drive to another
  • Copy and Paste
  • Shortcut Menu

32
The Help Command
  • Accessed from the Start button
  • Tabs
  • Contents tab
  • Index tab
  • Search tab
  • Favorites tab
  • Web help
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