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Parts of the computer 1.ppt
Parts of a Computer
 A computer has various parts, and each
part performs a specific function. These
parts can be classified as input devices,
output devices, CPU and memory,
motherboard, expansion cards, storage
devices and services, and ports and
connections.
Input Devices
Mouse
 A device that you use to interact with items
displayed on the computer screen. A
standard mouse has a left and a right button.
 You use the left button to select items and
provide instructions by clicking an active
area on the screen. You use the right button
to display commonly used menu items on the
screen.
Keyboard
 A set of keys that resembles a keyboard
on a typewriter. You use the keyboard to
type text such as letters or numbers into
the computer.
Microphone
 A device that you can use to talk to
people in different parts of the world.
You can record sound into a computer
by using a microphone. You can also
record your speech and let the computer
convert it into text.
Scanner
 A device that is similar to a photocopy
machine. You can use this device to
transfer an exact copy of a photograph
or document into a computer. A scanner
reads a page and translates it into a
digital format that a computer can read.
Webcam
 A device that is similar to a video
camera. It allows you to capture and
send live pictures to other users. For
example, a Webcam allows your friends
and family to see you when you are
communicating with them.
Stylus
 A pointing device, similar to a pen, used to
make selections and enter information by
tapping on a touch sensitive surface.
Trackball
 A pointing device that
is an alternative to a
mouse. A trackball
consists of a ball that
is rotated to move the
pointer on a computer
screen. You can use
a trackball when you
have limited desk
space.
Output Devices
Monitor
 A device that is similar to a television. It
is used to display information in the form
of text and graphics.
Printer
 A device that you use to transfer text
and images from a computer to a paper
or to another medium, such as a
transparency film. You can use a printer
to create a paper copy of whatever you
see on your monitor.
Speakers and Headphones
 A device that allows you to hear sounds.
Speakers may either be external or built
into the computer.
CPU and Memory
 The CPU is a device that interprets and
runs the commands that you give to a
computer. It is the control unit of a
computer. The CPU is also referred to
as the processor.
 Memory is where information is stored
and retrieved by the CPU. There are
three main types of memory.
Random Access Memory
(RAM)
 It is the main memory of a
computer and allows you to
temporarily store commands and
data. The CPU reads data and
commands from RAM to perform
specific tasks. RAM is volatile,
which means it is available only
while the computer is turned on.
The contents of RAM must be
copied to a storage device if you
want to save the data in the RAM.
Read Only Memory (ROM)
 It is the memory that retains its contents
even after the computer is turned off. ROM is
nonvolatile, or permanent, memory that is
commonly used to store commands, such as
the commands that check whether all parts
of the computer are working properly before
you can actually work with the computer.
Flash Memory
 It is a nonvolatile memory that retains
data even after a computer is turned off.
Unlike in ROM, you can erase or modify
stored information.
Motherboard
 The motherboard is
the main circuit board
inside a computer. It
has tiny electronic
circuits and other
components on it. The
motherboard connects
input, output, and
processing devices
together and tells the
CPU how to run.
Expansion Card
 An expansion card is a circuit board that
can be attached to a motherboard to
add features such as video display and
audio capability to your computer. An
expansion card improves the
performance of your computer and
enhances its features. Expansion cards
are also called expansion boards.
 Video card, NIC, Sound card
Storage Devices & Services
 You use storage devices to store
computer information. Storage devices
come in many forms. Some examples
are hard drive or disk, CD-ROM, floppy
disk, and DVD-ROM. Storage devices
can be divided into two types, internal
storage devices and external storage
devices.
Hard disk
 A magnetic disk that is usually the main
storage device on most computers. It
can be an external or an internal device.
Floppy Disk
 A portable storage device that allows
you to store a small amount of data. A
disadvantage of this disk is that it can be
easily damaged by heat, dust, or
magnetic fields.
CD-ROM
 A portable storage medium that allows
you to store 400 times more data than
on a floppy disk. It is less prone to
damage than a floppy disk.
DVD-ROM
 A portable storage medium that is
similar to a CD-ROM; however, it can
store larger amounts of data than a
floppy disk or a CD-ROM. A DVD-ROM
is commonly used to store movies and
videos.
USB Flash Drive
 A small portable storage device that is
typically the size of a thumb. USB flash
drives have less storage capacity as
compared to an external hard-drive but
are more durable and easy-to-use. They
can be plugged into any computer with a
USB drive and as such are a very
popular medium of storage.
Cloud Storage
 A modern, fast growing storage service that
uses the Internet and central remote servers
to maintain and store data and applications.
Windows Live SkyDrive is an example of
cloud storage service. SkyDrive provides
enough free storage for thousands of
documents and photos, has powerful
permissions settings, and offers Microsoft
Office Web Apps that you can access online.
Ports and Connections
 A port is a channel through which data is
transferred between input/output
devices and the processor. There are
several types of ports that you can use
to connect a computer to external
devices and networks.
Universal Serial Bus (USB) port
 You use this to connect peripheral devices
such as a mouse, modem, keyboard, or
printer to a computer.
Firewire
 You use this to connect devices such as
a digital camera. It is faster than a USB
port.
Network Port
 You use this to connect a computer to
other computers to exchange
information between the computers.
Parallel Port & Serial Port
 You use these ports to
connect printers and
other devices to a
personal computer.
However, the USB port
is now preferred to
connect peripheral
devices because it is
faster and easier to use.
Display Adapter
 You connect a monitor to a display
adapter on your computer. The display
adapter generates the video signal
received from a computer, and sends it
to a monitor through a cable. The
display adapter may be on the
motherboard, or on an expansion card.
Power
 A motherboard and other components
inside a computer use direct current
(DC). A power supply takes alternating
current (AC) from a wall outlet and
converts it into DC power.

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Parts of the computer 1.ppt

  • 2. Parts of a Computer  A computer has various parts, and each part performs a specific function. These parts can be classified as input devices, output devices, CPU and memory, motherboard, expansion cards, storage devices and services, and ports and connections.
  • 4. Mouse  A device that you use to interact with items displayed on the computer screen. A standard mouse has a left and a right button.  You use the left button to select items and provide instructions by clicking an active area on the screen. You use the right button to display commonly used menu items on the screen.
  • 5. Keyboard  A set of keys that resembles a keyboard on a typewriter. You use the keyboard to type text such as letters or numbers into the computer.
  • 6. Microphone  A device that you can use to talk to people in different parts of the world. You can record sound into a computer by using a microphone. You can also record your speech and let the computer convert it into text.
  • 7. Scanner  A device that is similar to a photocopy machine. You can use this device to transfer an exact copy of a photograph or document into a computer. A scanner reads a page and translates it into a digital format that a computer can read.
  • 8. Webcam  A device that is similar to a video camera. It allows you to capture and send live pictures to other users. For example, a Webcam allows your friends and family to see you when you are communicating with them.
  • 9. Stylus  A pointing device, similar to a pen, used to make selections and enter information by tapping on a touch sensitive surface.
  • 10. Trackball  A pointing device that is an alternative to a mouse. A trackball consists of a ball that is rotated to move the pointer on a computer screen. You can use a trackball when you have limited desk space.
  • 12. Monitor  A device that is similar to a television. It is used to display information in the form of text and graphics.
  • 13. Printer  A device that you use to transfer text and images from a computer to a paper or to another medium, such as a transparency film. You can use a printer to create a paper copy of whatever you see on your monitor.
  • 14. Speakers and Headphones  A device that allows you to hear sounds. Speakers may either be external or built into the computer.
  • 15. CPU and Memory  The CPU is a device that interprets and runs the commands that you give to a computer. It is the control unit of a computer. The CPU is also referred to as the processor.  Memory is where information is stored and retrieved by the CPU. There are three main types of memory.
  • 16. Random Access Memory (RAM)  It is the main memory of a computer and allows you to temporarily store commands and data. The CPU reads data and commands from RAM to perform specific tasks. RAM is volatile, which means it is available only while the computer is turned on. The contents of RAM must be copied to a storage device if you want to save the data in the RAM.
  • 17. Read Only Memory (ROM)  It is the memory that retains its contents even after the computer is turned off. ROM is nonvolatile, or permanent, memory that is commonly used to store commands, such as the commands that check whether all parts of the computer are working properly before you can actually work with the computer.
  • 18. Flash Memory  It is a nonvolatile memory that retains data even after a computer is turned off. Unlike in ROM, you can erase or modify stored information.
  • 19. Motherboard  The motherboard is the main circuit board inside a computer. It has tiny electronic circuits and other components on it. The motherboard connects input, output, and processing devices together and tells the CPU how to run.
  • 20. Expansion Card  An expansion card is a circuit board that can be attached to a motherboard to add features such as video display and audio capability to your computer. An expansion card improves the performance of your computer and enhances its features. Expansion cards are also called expansion boards.  Video card, NIC, Sound card
  • 21. Storage Devices & Services  You use storage devices to store computer information. Storage devices come in many forms. Some examples are hard drive or disk, CD-ROM, floppy disk, and DVD-ROM. Storage devices can be divided into two types, internal storage devices and external storage devices.
  • 22. Hard disk  A magnetic disk that is usually the main storage device on most computers. It can be an external or an internal device.
  • 23. Floppy Disk  A portable storage device that allows you to store a small amount of data. A disadvantage of this disk is that it can be easily damaged by heat, dust, or magnetic fields.
  • 24. CD-ROM  A portable storage medium that allows you to store 400 times more data than on a floppy disk. It is less prone to damage than a floppy disk.
  • 25. DVD-ROM  A portable storage medium that is similar to a CD-ROM; however, it can store larger amounts of data than a floppy disk or a CD-ROM. A DVD-ROM is commonly used to store movies and videos.
  • 26. USB Flash Drive  A small portable storage device that is typically the size of a thumb. USB flash drives have less storage capacity as compared to an external hard-drive but are more durable and easy-to-use. They can be plugged into any computer with a USB drive and as such are a very popular medium of storage.
  • 27. Cloud Storage  A modern, fast growing storage service that uses the Internet and central remote servers to maintain and store data and applications. Windows Live SkyDrive is an example of cloud storage service. SkyDrive provides enough free storage for thousands of documents and photos, has powerful permissions settings, and offers Microsoft Office Web Apps that you can access online.
  • 28. Ports and Connections  A port is a channel through which data is transferred between input/output devices and the processor. There are several types of ports that you can use to connect a computer to external devices and networks.
  • 29. Universal Serial Bus (USB) port  You use this to connect peripheral devices such as a mouse, modem, keyboard, or printer to a computer.
  • 30. Firewire  You use this to connect devices such as a digital camera. It is faster than a USB port.
  • 31. Network Port  You use this to connect a computer to other computers to exchange information between the computers.
  • 32. Parallel Port & Serial Port  You use these ports to connect printers and other devices to a personal computer. However, the USB port is now preferred to connect peripheral devices because it is faster and easier to use.
  • 33. Display Adapter  You connect a monitor to a display adapter on your computer. The display adapter generates the video signal received from a computer, and sends it to a monitor through a cable. The display adapter may be on the motherboard, or on an expansion card.
  • 34. Power  A motherboard and other components inside a computer use direct current (DC). A power supply takes alternating current (AC) from a wall outlet and converts it into DC power.