osName

The name of the operating system on which After Effects is running.NOTE: As of Windows 7, this attribute returns a blank value. Use $.os instead.String; rea

userName

The name of the user currently logged on to the system.String; read-only.

callSystem()

Executes a system command, as if you had typed it on the operating systemメs command line. Returns whatever the system outputs in response to the command, if

machineName

The name of the computer on which After Effects is running.String; read-only.