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Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
McGraw-Hill Technology Education
McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
McGraw-Hill Technology Education
Chapter 1B
Looking Inside the
Computer System
1B-3
Parts of the Computer System
• Computer systems have four parts
– Hardware
– Software
– Data
– User
1B-4
Parts of the Computer System
• Hardware
– Mechanical devices in the computer
– Anything that can be touched
• Software
– Tell the computer what to do
– Also called a program
– Thousands of programs exist
1B-5
Parts of the Computer System
• Data
– Pieces of information
– Computer organize and present data
• Users
– People operating the computer
– Most important part
– Tell the computer what to do
1B-6
Information Processing Cycle
• Steps followed to process data
• Input
• Processing
• Output
• Storage
1B-7
Essential Computer Hardware
• Computers use the same basic
hardware
• Hardware categorized into four types
1B-8
Essential Computer Hardware
• Processing devices
– Brains of the computer
– Carries out instructions from the program
– Manipulate the data
– Most computers have several processors
– Central Processing Unit (CPU)
– Secondary processors
– Processors made of silicon and copper
1B-9
Essential Computer Hardware
• Memory devices
– Stores data or programs
– Random Access Memory (RAM)
• Volatile
• Stores current data and programs
• More RAM results in a faster system
– Read Only Memory (ROM)
• Permanent storage of programs
• Holds the computer boot directions
1B-10
Essential Computer Hardware
• Input and output devices
– Allows the user to interact
– Input devices accept data
• Keyboard, mouse
– Output devices deliver data
• Monitor, printer, speaker
– Some devices are input and output
• Touch screens
1B-11
Essential Computer Hardware
• Storage devices
– Hold data and programs permanently
– Different from RAM
– Magnetic storage
• Floppy and hard drive
• Uses a magnet to access data
– Optical storage
• CD and DVD drives
• Uses a laser to access data
1B-12
Software Runs The Machine
• Tells the computer what to do
• Reason people purchase computers
• Two types
– System software
– Application software
1B-13
Software Runs The Machine
• System software
– Most important software
– Operating system
• Windows XP
– Network operating system (OS)
• Windows Server 2003
– Utility
• Symantec AntiVirus
1B-14
Software Runs The Machine
• Application software
– Accomplishes a specific task
– Most common type of software
• MS Word
– Covers most common uses of computers
1B-15
Computer data
• Fact with no meaning on its own
• Stored using the binary number system
• Data can be organized into files
1B-16
Computer users
• Role depends on ability
– Setup the system
– Install software
– Mange files
– Maintain the system
• “Userless” computers
– Run with no user input
– Automated systems
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
McGraw-Hill Technology Education
Chapter 1B
End of Chapter

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What is computer

  • 1. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
  • 2. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Chapter 1B Looking Inside the Computer System
  • 3. 1B-3 Parts of the Computer System • Computer systems have four parts – Hardware – Software – Data – User
  • 4. 1B-4 Parts of the Computer System • Hardware – Mechanical devices in the computer – Anything that can be touched • Software – Tell the computer what to do – Also called a program – Thousands of programs exist
  • 5. 1B-5 Parts of the Computer System • Data – Pieces of information – Computer organize and present data • Users – People operating the computer – Most important part – Tell the computer what to do
  • 6. 1B-6 Information Processing Cycle • Steps followed to process data • Input • Processing • Output • Storage
  • 7. 1B-7 Essential Computer Hardware • Computers use the same basic hardware • Hardware categorized into four types
  • 8. 1B-8 Essential Computer Hardware • Processing devices – Brains of the computer – Carries out instructions from the program – Manipulate the data – Most computers have several processors – Central Processing Unit (CPU) – Secondary processors – Processors made of silicon and copper
  • 9. 1B-9 Essential Computer Hardware • Memory devices – Stores data or programs – Random Access Memory (RAM) • Volatile • Stores current data and programs • More RAM results in a faster system – Read Only Memory (ROM) • Permanent storage of programs • Holds the computer boot directions
  • 10. 1B-10 Essential Computer Hardware • Input and output devices – Allows the user to interact – Input devices accept data • Keyboard, mouse – Output devices deliver data • Monitor, printer, speaker – Some devices are input and output • Touch screens
  • 11. 1B-11 Essential Computer Hardware • Storage devices – Hold data and programs permanently – Different from RAM – Magnetic storage • Floppy and hard drive • Uses a magnet to access data – Optical storage • CD and DVD drives • Uses a laser to access data
  • 12. 1B-12 Software Runs The Machine • Tells the computer what to do • Reason people purchase computers • Two types – System software – Application software
  • 13. 1B-13 Software Runs The Machine • System software – Most important software – Operating system • Windows XP – Network operating system (OS) • Windows Server 2003 – Utility • Symantec AntiVirus
  • 14. 1B-14 Software Runs The Machine • Application software – Accomplishes a specific task – Most common type of software • MS Word – Covers most common uses of computers
  • 15. 1B-15 Computer data • Fact with no meaning on its own • Stored using the binary number system • Data can be organized into files
  • 16. 1B-16 Computer users • Role depends on ability – Setup the system – Install software – Mange files – Maintain the system • “Userless” computers – Run with no user input – Automated systems
  • 17. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Chapter 1B End of Chapter