- Additional directories found in some larger option trees:

  Click image for larger view.

  dat
    Holds any required data files.
  docs
    Option tree documentation.
  host
    Holds X-Midas host primitives used via XBC.
  inc
    Holds any include files or Java interface definitions.
  intr
    Holds intrinsic commands.
  jars
    Holds any additional (external) Java libraries (jar files) that this option tree depends on.
  lib
    Holds any libraries.
    Option trees with many libraries will split them up into `lib` (general purpose), `libg` (graphical), `libm` (math), `libxm` (X-Midas compatibility), and `net` (networking).