Typedefs starting with `o' in bsd/hfs/hfscommon/headers/system

• OptionBits bsd/hfs/hfscommon/headers/system/MacOSTypes.h:198
• OSErr bsd/hfs/hfscommon/headers/system/MacOSTypes.h:188
• OSStatus bsd/hfs/hfscommon/headers/system/MacOSTypes.h:189
• OSType bsd/hfs/hfscommon/headers/system/MacOSTypes.h:205
• OSTypePtr bsd/hfs/hfscommon/headers/system/MacOSTypes.h:207