[O]

1. O
2. OBSOLETE_GUS_PATCH
3. OCRNL
4. OF
5. OFDEL
6. OFF
7. OFFCNT
8. OFFSET_MAX
9. OFFS_4OP
10. OFILL
11. OGMB_CNT
12. OID
13. OID_
14. OK
15. OLCUC
16. OLD_GZIP_MAGIC
17. OMAGIC
18. ON
19. ONLCR
20. ONLRET
21. ONOCR
22. OPEN_MAX
23. OPEN_READ
24. OPEN_READWRITE
25. OPEN_WRITE
26. OPERATION_MODE_1
27. OPERATION_MODE_2
28. OPL3_BOTH
29. OPL3_ENABLE
30. OPL3_LEFT
31. OPL3_MODE_REGISTER
32. OPL3_PATCH
33. OPL3_RIGHT
34. OPOST
35. OPT_ADLIB
36. OPT_AUDIO
37. OPT_CHIP_MIDI
38. OPT_GUS
39. OPT_HIGHLEVEL
40. OPT_LAST
41. OPT_LAST_MUTUAL
42. OPT_MIDI
43. OPT_MIDI_AUTO
44. OPT_MPU401
45. OPT_PAS
46. OPT_SB
47. OPT_SBPRO
48. OPT_SEQUENCER
49. OPT_YM3812
50. OPT_YM3812_AUTO
51. OP_HOST_ADAPTER
52. OP_RESET
53. OP_SCSI
54. OP_SIZE_PREFIX
55. ORDERED_QUEUE_TAG
56. ORIG_EAX
57. ORIG_EIP
58. ORIG_NAME
59. ORIG_ROOT_DEV
60. ORIG_VIDEO_COLS
61. ORIG_VIDEO_EGA_AX
62. ORIG_VIDEO_EGA_BX
63. ORIG_VIDEO_EGA_CX
64. ORIG_VIDEO_LINES
65. ORIG_VIDEO_MODE
66. ORIG_VIDEO_PAGE
67. ORIG_X
68. ORIG_Y
69. OUTB
70. OUTBUFSIZ
71. OUTBUF_EXTRA
72. OUTPUT_DATA_REG
73. OUTPUT_READY
74. OUT_FILTER
75. OUT_ON_PORT
76. O_ACCMODE
77. O_APPEND
78. O_CREAT
79. O_CRNL
80. O_EXCL
81. O_LCUC
82. O_M_1_CDROM_TYPE
83. O_M_1_FM_TYPE
84. O_M_1_PCM_TYPE
85. O_M_2_BOARD_REVISION
86. O_M_2_BUS_TIMING
87. O_M_2_PCS_ENABLED
88. O_NDELAY
89. O_NLCR
90. O_NLRET
91. O_NOCR
92. O_NOCTTY
93. O_NONBLOCK
94. O_POST
95. O_RDONLY
96. O_RDWR
97. O_SYNC
98. O_TABDLY
99. O_TRUNC
100. O_WRONLY