looking inside the computer system. parts of the computer system computer systems have four parts...
TRANSCRIPT
Looking Inside the Computer System
Parts of the Computer System Computer systems have four parts
HardwareSoftwareDataUser
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Parts of the Computer System Hardware
Mechanical devices in the computerAnything that can be touched
SoftwareTell the computer what to doAlso called a programThousands of programs exist
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Parts of the Computer System Data
Pieces of informationComputer organize and present data
UsersPeople operating the computerMost important partTell the computer what to do
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Information Processing Cycle Steps followed to process data Input Processing Output Storage
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Essential Computer Hardware Computers use the same basic
hardware Hardware categorized into four types
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Essential Computer Hardware Processing devices
Brains of the computerCarries out instructions from the programManipulate the dataMost computers have several processorsCentral Processing Unit (CPU)Secondary processorsProcessors made of silicon and copper
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Essential Computer Hardware Memory devices
Stores data or programsRandom 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
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Essential Computer Hardware Input and output devices
Allows the user to interactInput devices accept data
○ Keyboard, mouseOutput devices deliver data
○ Monitor, printer, speakerSome devices are input and output
○ Touch screens
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Essential Computer Hardware Storage devices
Hold data and programs permanentlyDifferent from RAMMagnetic storage
○ Floppy and hard drive○ Uses a magnet to access data
Optical storage○ CD and DVD drives○ Uses a laser to access data
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Software Runs The Machine Tells the computer what to do Reason people purchase computers Two types
System softwareApplication software
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Software Runs The Machine System software
Most important softwareOperating system
○ Windows XPNetwork operating system (OS)
○ Windows Server 2003Utility
○ Symantec AntiVirus
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Software Runs The Machine Application software
Accomplishes a specific taskMost common type of software
○ MS WordCovers most common uses of computers
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Computer data
Fact with no meaning on its own Stored using the binary number system Data can be organized into files
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Computer users
Role depends on abilitySetup the systemInstall softwareManage filesMaintain the system
“Userless” computersRun with no user inputAutomated systems
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