About compression and extraction

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About compression and extraction

• Written by group 6

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• We are going to announce compression and
  extraction. In our student life , personal
  computer is very useful and very important. So,
  we researched Compression and extraction of a
  file. Because these are very closely relation
  with computer.
• Compression is decreasing file's size using a
  fixed order. Compressions good points are, if
  you send a file on the network, compressed files
  sending time is shouter than originals it. And
  It is very useful to preservation in a memory.
  Extraction is return to original file. Next, We
  are going to tell you further information
  compression.

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Compression

• CAB ? The best rate of compression
• ZIP ? The fastest compression form
• You should use as you think of rate of
  compression and time it take
• There are many many compression form, and some
  of them are better than

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Extraction

• Extraction ?Defrosting freezing tuna frozen
  
• Food by microwave oven
• Extraction Compressed file recover
• Extraction type ? Need tool
• ? Not need tool? self-unpacking form
• Type ? extension is EXE
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• This extension doesnt need software.
• It is easy for beginner to use
• Famous tool ? ?Lhasa ?, ? Kaito Renzi ?, ?
  Lhaplus ?

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• Finally, we talk about compression and unpacking,
  after all, file compression and unpacking is
  useful.
• If you use well, it is very effective to treat
  file
• But, when you treat it, there is one thing that
  you should take care of.
• It is computer virus.
• It is possible that if you download compressed
  file, then you unpack, then your computer is
  infected.
• So, before unpacking, you should check virus.

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• Well, thats all about our explanation.
• Thank you for your listening.

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Question

• Please mention one compression's form it is often
  used in Japan
• What extension is it that is self-unpacking form?
• Before you unpack file, What should you do?