How do I get the username of system?

[Richard Gaskin]

Bill Vlahos wrote:

 > On Oct 27, 2013, at 4:24 PM, Richard Gaskin <ambassador at 
fourthworld.com> wrote:
 >
 >> No externals needed - the info is available in a global var:
 >>
 >> Mac:     $USER
 >> Linux:   $USER
 >> Windows: $USERNAME
 >
 > Where did you find this? I don’t see it in the Dictionary.

I looked in the globalNames.

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  Richard Gaskin
  Fourth World
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