[R]

[..]
  1. RCTRL
  2. READ
  3. READA
  4. READY_STAT
  5. READ_10
  6. READ_6
  7. READ_CAPACITY
  8. REALLY_SLOW_IO
  9. REASSIGN_BLOCKS
  10. RECIEVE_DAIGNOSTIC
  11. RECONNECT_NOW
  12. RECOVERED_ERROR
  13. REDO
  14. REG
  15. RELEASE
  16. REMOVE_LINKS
  17. REQUEST_SENSE
  18. REQ_CMDOUT
  19. REQ_DATAIN
  20. REQ_DATAOUT
  21. REQ_MASK
  22. REQ_MSGIN
  23. REQ_MSGOUT
  24. REQ_STATIN
  25. RESERVATION_CONFLICT
  26. RESERVE
  27. RESET_TIMEOUT
  28. RESTORE_MOST
  29. RESTORE_POINTERS
  30. REZERO_UNIT
  31. RLIMIT_CORE
  32. RLIMIT_CPU
  33. RLIMIT_DATA
  34. RLIMIT_FSIZE
  35. RLIMIT_MEMLOCK
  36. RLIMIT_NPROC
  37. RLIMIT_OFILE
  38. RLIMIT_RSS
  39. RLIMIT_STACK
  40. RLIM_INFINITY
  41. RLIM_NLIMITS
  42. ROUNDING
  43. ROUND_0
  44. ROUND_DOWN
  45. ROUND_NEAREST
  46. ROUND_UP
  47. RO_IOCTLS
  48. RSHIFT
  49. RUSAGE_CHILDREN
  50. RUSAGE_SELF
  51. Read_FIFO
  52. Read_Loopback
  53. Read_SCSI_Data
[..]