[I]

[..]
  1. I387
  2. ICANON
  3. ICMB_CNT
  4. ICM_DATA_PTR
  5. ICRNL
  6. ID
  7. IDENTIFY
  8. IDENTIFY_BASE
  9. IDLE
  10. ID_ERR
  11. IEXTEN
  12. IGNBRK
  13. IGNCR
  14. IGNPAR
  15. ILLEGAL_REQUEST
  16. IMAXBEL
  17. IMB
  18. INC
  19. INDEX_STAT
  20. INDIRECT_BLOCK
  21. INIT
  22. INITIATOR_ERROR
  23. INIT_C_CC
  24. INIT_REQUEST
  25. INIT_TASK
  26. INLCR
  27. INPCK
  28. INQUIRY
  29. INTERMEDIATE_C_GOOD
  30. INTERMEDIATE_GOOD
  31. INTERNAL_ERROR
  32. INTRFLAGS
  33. INTRMASK
  34. INTR_ACK
  35. INTR_CHAR
  36. INTR_STAT
  37. INT_EN
  38. INT_IM
  39. INVDCMD
  40. IN_ABORT
  41. IN_ON_PORT
  42. IN_ORDER
  43. IN_RESET
  44. IO_BITMAP_SIZE
  45. IRQ_NAME
  46. IRQ_NAME2
  47. IRST
  48. ISIG
  49. ISTRIP
  50. IS_A_CONSOLE
  51. IS_A_PTY
  52. IS_A_PTY_MASTER
  53. IS_A_PTY_SLAVE
  54. IS_A_SERIAL
  55. IS_NODEV
  56. IS_NOEXEC
  57. IS_NOSUID
  58. IS_RDONLY
  59. IS_RESETTING
  60. IS_SEEKABLE
  61. IS_SYNC
  62. ITIMER_PROF
  63. ITIMER_REAL
  64. ITIMER_VIRTUAL
  65. IUCLC
  66. IXANY
  67. IXOFF
  68. IXON
  69. I_BLOCK_SPECIAL
  70. I_CHAR_SPECIAL
  71. I_CRNL
  72. I_DIRECTORY
  73. I_IXON
  74. I_NAMED_PIPE
  75. I_NLCR
  76. I_NOCR
  77. I_REGULAR
  78. I_SET_GID_BIT
  79. I_SET_UID_BIT
  80. I_STRP
  81. I_TYPE
  82. I_UCLC
  83. Interrupt_Cntl
[..]