computer system components 6th grade frit 8530
TRANSCRIPT
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Computer System Components
Standard: MSBCS – BCS1-1
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Input Devices
Any hardware used to send data to the computer.
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Examples of Input Devices
• Keyboard
• Pointing Device - ex: mouse
• Joystick – lever that can be moved
in all directions to move objects
on the screen.
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Examples of Input Devices (Con’t)
• Digital Camera – takes and stores photos in a digital form that the computer can work with
• Scanner – lets you copy printed images into a computer.
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Examples of Input Devices (Con’t)
• Microphone – used to input sounds
• Modem – allows one computer to input data into another computer. Often used to connect a computer to the internet.
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Keyboard
Joystick
Mouse
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Microphone Digital Camera
Modem
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Output Devices
Any piece of hardware that displays or plays back the result of computer processing.
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Output Devices Examples
• Monitors
• Printers – makes a hard copy of the display shown on a monitor
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Monitor
Printer
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Microprocessors
Also known as a CPU (Central Processing Unit)
CPU – the brain of the computer
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Operating Systems
An operating system is software, consisting of programs and data, that runs on computers and manages computer hardware resources and provides services for execution of various application software.
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Most Popular Operating Systems
• Windows 2003• Windows 2007• Windows XP • Windows Vista• MacOs X • Linux
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Software Applications
Used for a specific purpose such as creating text documents, worksheets or graphics
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Software Application Examples
• Microsoft Word – used to create text documents
• Microsoft PowerPoint – used to create presentations
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Software Applications Examples (Con’t)
• Microsoft Excel – used to create spreadsheets
• Microsoft Access – used to create databases
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Memory
When people talk about computer memory, they usually mean a set of chips that acts as a temporary workspace in the computer.
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Two Types of Memory
• RAM – Random Access Memory – stores its contents temporarily; if the computer loses power, RAM’s contents are lost
• ROM – Read Only Memory – stores its contents permanently, even when the computer is turned off
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Storage Devices
Object that physically holds data or program instructions
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Examples of Storage Devices
• Floppy disk drives
• Hard Drives
• CD-ROM and DVD-ROM Drives
• Tape Drives
• Flash Drives
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Floppy DiskHard Drive
CD/DVDFlash Drive
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Unit for Measuring Computer Memory
• GB – gigobyte (1 GB = 1024 Megabytes)
• MB – megabyte (1,000,000 bytes)
**Gigobyte is larger than a megabyte!
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Speed of Microprocessors
• MHz – megahertz (1 million cycles per second)
• GHz – gigahertz (1 billion cycles per second)
**Gigahertz is faster than a Megahertz!!
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BibliographyThe American Heritage® ScienceDictionary. (Retrieved February 23, 2011,
from Dictionary.com website: http://dictionary.reference.com/browse/input devices
Input Device, n.d., Retrieved February 18, 2011, http://www.computerhope.com/jargon/i/inputdev.htm
Output Device, n.d., Retrieved February 20, 2011, http://www.techterms.com/definition/outputdevice
Operating system, n.d., Retrieved February 16, 2011, http://en.wikipedia.org/wiki/Operating_system
Computer memory, n.d., Retrieved February 21, 2011, http://en.wikipedia.org/wiki/Computer_memory
WordNet 3.0, Farlex clipart collection. (2003-2008). Retrieved February 15, 2011 from http://www.thefreedictionary.com/computer+memory+unit
The American Heritage Dictionary of the English Language. Fourth Edition. (2003) Retrieved February 15, 2011 from http://www.thefreedictionary.com/gigahertz
The American Heritage Dictionary of the English Language, Fourth Edition. (2003) Retrieved February 15, 2011 from http://www.thefreedictionary.com/megahertz