[M]

[..]
  1. MAJOR
  2. MAP_NR
  3. MARK_ERR
  4. MAX
  5. MAX_ARG_PAGES
  6. MAX_ERRORS
  7. MAX_HD
  8. MAY_EXEC
  9. MAY_READ
  10. MAY_WRITE
  11. MIN
  12. MINIX_HEADER
  13. MINOR
  14. MINUTE
[..]