- Special AUX Entries:
  - There are a number of special AUX entries:
    CWD - Current Working Directory
      This is the current working directory for the OS when the shell was started.
      This is automatically set and should not be altered.
    HOME - User's Login Directory
      This is automatically set and should not be altered.
    HOMEPATH - The Current Homepath
      Home macros (also called percent macros) are run from this directory
      This should only be changed via the `HOMEPATH` command.
    DAT - NeXtMidas System Data
      NeXtMidas SYS option tree DAT subdirectory (`$NMROOT/nxm/sys/dat`)
      Contains a number of sample files used in demos and testing
    RAM - In-Memory Files and Pipes
      NeXtMidas in-memory directory (`ram:`). Very useful for high-speed file access and WebStart applications
      Any active data pipes will be listed in here. (See the Macros module for details.)
    1 - Typical Midas User's Data Directory
      Typical Midas user write directory (`/midas/data1/+/`), can be changed as appropriate.
    11 - `/data11/+/`
      Typical Midas directory, not available on all systems
    12 - `/data12/+/`
      Typical Midas directory, not available on all systems
    99 - X-Midas System Data
      X-Midas SYS option tree DAT subdirectory (`$XMDISK/xm/dat`), available if X-Midas is installed

X-Midas Users Take Note:
You may recognize the AUXs 1, 11, 12, and 99 from your X-Midas experience, NeXtMidas uses them similarly.