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| '''PATHEXT''' || System returns a list of the file extensions that the OS considers to be executable.
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| '''PROCESSOR_ARCHITECTURE''' || System returns the processor's chip architecture. Values: x86, IA64, AMD64.
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| '''PROCESSOR_IDENTFIER''' || System returns a description of the processor.
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| '''PROGRAMFILES''' || Returns the location of the Program Files directory.
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| '''PROGRAMFILES(x86)''' || Returns the location of the Program Files directory for 32-bit applications on Windows 64-bit.
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| '''PROMPT''' || Local returns the command-prompt settings for the current interpreter. Cmd.exe generates this variable.