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Symbols, numbers A B C D E F G H I J K L M N O P Q R S T U V W X

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• handling signals
• hard disk
• hash bang (#!) support
• head(C)
• help
  • apropos(C)
  • in SCO Shell
  • man(C)
  • whatis(C)
• here document
• home directory
• .hushlogin