1. DMMS (Dynamic Memory Management System)
   1. hpalloc-Memory allocation routine
      1. ptr
      2. nw
      3. ier
      4. iabt
   2. hpdeallc-Memory deallocation routine
      1. ptr
      2. errcode
      3. abort
   3. memoirc-Memory integrity check routine
      1. msg_lvl
   4. hpcheck-Memory integrity check routine
      1. errcode
   5. bkcheck-Memory integrity check routine
      1. addr
      2. errcode
   6. dmmsdbg-Activates / deactivates debugging messages .
      1. mode
   7. DMMS environment variables
      1. DEBUG_MODE
      2. INITMEM
      3. BAD_POINTER
   8. EXAMPLE OF USE