[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. OPSW
36. OPT_ADLIB
37. OPT_AUDIO
38. OPT_CHIP_MIDI
39. OPT_GUS
40. OPT_HIGHLEVEL
41. OPT_LAST
42. OPT_LAST_MUTUAL
43. OPT_MIDI
44. OPT_MIDI_AUTO
45. OPT_MPU401
46. OPT_PAS
47. OPT_SB
48. OPT_SB16
49. OPT_SBPRO
50. OPT_SEQUENCER
51. OPT_YM3812
52. OPT_YM3812_AUTO
53. OP_HOST_ADAPTER
54. OP_RESET
55. OP_SCSI
56. OP_SIZE_PREFIX
57. ORDERED_QUEUE_TAG
58. ORIG_EAX
59. ORIG_EIP
60. ORIG_NAME
61. ORIG_ROOT_DEV
62. ORIG_VIDEO_COLS
63. ORIG_VIDEO_EGA_AX
64. ORIG_VIDEO_EGA_BX
65. ORIG_VIDEO_EGA_CX
66. ORIG_VIDEO_LINES
67. ORIG_VIDEO_MODE
68. ORIG_VIDEO_PAGE
69. ORIG_X
70. ORIG_Y
71. OUTB
72. OUTBUFSIZ
73. OUTBUF_EXTRA
74. OUTPUT_DATA_REG
75. OUTPUT_READY
76. OUT_FILTER
77. OUT_ON_PORT
78. O_ACCMODE
79. O_APPEND
80. O_CREAT
81. O_CRNL
82. O_EXCL
83. O_LCUC
84. O_M_1_CDROM_TYPE
85. O_M_1_FM_TYPE
86. O_M_1_PCM_TYPE
87. O_M_2_BOARD_REVISION
88. O_M_2_BUS_TIMING
89. O_M_2_PCS_ENABLED
90. O_NDELAY
91. O_NLCR
92. O_NLRET
93. O_NOCR
94. O_NOCTTY
95. O_NONBLOCK
96. O_POST
97. O_RDONLY
98. O_RDWR
99. O_SYNC
100. O_TABDLY
101. O_TRUNC
102. O_WRONLY