- includes:
  - atrdef.h
  - dcdef.h
  - descrip.h
  - dvsdef.h
  - fab.h
  - fibdef.h
  - gen64def.h
  - iledef.h
  - iodef.h
  - lib$routines.h
  - libfildef.h
  - libfisdef.h
  - lnmdef.h
  - nam.h
  - rms.h
  - rmsdef.h
  - ssdef.h
  - starlet.h
  - str$routines.h
  - stsdef.h
  - syidef.h
  - times.h
  - unixio.h