Input/Output                   Input/Output routines
 Arithmetic                     Arithmetic routines
 File                           File handling routines
 Heap                           Heap control routines
 Memory                         Memory, Interrupts, Pointers, Flow
 Scalar                         Ordinal, rounding, Ascii, transfer
 Directory                      Disk directory routines
 Screen                         Text screen and window routines
 Graphics                       Graphics and Sound routines
 String                         String handling routines