[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. OLD_SIOCGIFHWADDR
18. OMAGIC
19. ON
20. ONLCR
21. ONLRET
22. ONOCR
23. OPEN_MAX
24. OPEN_READ
25. OPEN_READWRITE
26. OPEN_WRITE
27. OPERATION_MODE_1
28. OPERATION_MODE_2
29. OPL3_BOTH
30. OPL3_ENABLE
31. OPL3_LEFT
32. OPL3_MODE_REGISTER
33. OPL3_PATCH
34. OPL3_RIGHT
35. OPOST
36. OPSW
37. OPTIMIZE_FLAG_TIME
38. OPT_ADLIB
39. OPT_AUDIO
40. OPT_CHIP_MIDI
41. OPT_GUS
42. OPT_HIGHLEVEL
43. OPT_LAST
44. OPT_LAST_MUTUAL
45. OPT_MIDI
46. OPT_MIDI_AUTO
47. OPT_MPU401
48. OPT_PAS
49. OPT_SB
50. OPT_SB16
51. OPT_SBPRO
52. OPT_SEQUENCER
53. OPT_YM3812
54. OPT_YM3812_AUTO
55. OP_HOST_ADAPTER
56. OP_RESET
57. OP_SCSI
58. OP_SIZE_PREFIX
59. ORDERED_QUEUE_TAG
60. ORIG_EAX
61. ORIG_NAME
62. ORIG_ROOT_DEV
63. ORIG_VIDEO_COLS
64. ORIG_VIDEO_EGA_AX
65. ORIG_VIDEO_EGA_BX
66. ORIG_VIDEO_EGA_CX
67. ORIG_VIDEO_LINES
68. ORIG_VIDEO_MODE
69. ORIG_VIDEO_PAGE
70. ORIG_X
71. ORIG_Y
72. OUT
73. OUTB
74. OUTBUFSIZ
75. OUTBUF_EXTRA
76. OUTPUT_DATA_REG
77. OUTPUT_READY
78. OUT_FILTER
79. OUT_ON_PORT
80. O_ACCMODE
81. O_APPEND
82. O_BSDLY
83. O_CRDLY
84. O_CREAT
85. O_EXCL
86. O_FFDLY
87. O_M_1_CDROM_TYPE
88. O_M_1_FM_TYPE
89. O_M_1_PCM_TYPE
90. O_M_2_BOARD_REVISION
91. O_M_2_BUS_TIMING
92. O_M_2_PCS_ENABLED
93. O_NDELAY
94. O_NLDLY
95. O_NOCTTY
96. O_NONBLOCK
97. O_OCRNL
98. O_OFDEL
99. O_OFILL
100. O_OLCUC
101. O_ONLCR
102. O_ONLRET
103. O_ONOCR
104. O_OPOST
105. O_RDONLY
106. O_RDWR
107. O_SYNC
108. O_TABDLY
109. O_TRUNC
110. O_VTDLY
111. O_WRONLY