[o]

[..]
  1. old_color_comparator
  2. old_cpio_header
  3. oldgnu_header
  4. open_include_file
  5. open_temp
  6. opendir
  7. operate_one_file
  8. operate_single_file
  9. order
  10. other_panel
  11. output_format_t
  12. overwrite_query_dialog
[..]