Similar to PF_(ファイアウォール)

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  CPython

  CPython
  
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  Cramfs

  Cramfs
  
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  CrDroid

  CrDroid
  
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  Cream (テキストエディタ)

  
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  CrossOver (ソフトウェア)

  CrossOver (software)
  
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  CRuby

  Ruby MRI
  
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  CrunchBang Linux

  CrunchBang Linux
  
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  Crystal Space

  Crystal Space
  
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  Csound

  Csound
  
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  CTWM

  CTWM
  
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  CubePDF

  
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  CUBRID

  CUBRID
  
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  CUPS

  CUPS
  
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  CuPy

  CuPy
  
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  CyanogenMod

  CyanogenMod
  
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  Cygwin

  Cygwin
  
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  Cygwin/X

  Cygwin/X
  
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  Cyrus IMAP server

  Cyrus IMAP server
  
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  Daredevil SKK

  
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  Darik's Boot and Nuke

  Darik's Boot and Nuke
  
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  Das U-Boot

  Das U-Boot
  
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  Dasher

  Dasher (software)
  
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  Dbndns

  Dbndns
  
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  DC++

  DC++
  
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  Debian

  Debian
  
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  Debian Almquist shell

  Debian Almquist shell
  
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  Debian GNU/Hurd

  
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  Deno

  Deno (software)