The X
按字母分类：
extension name file type Classification
OGNC Dynamic Web Page web file
OGS Origin LabTalk Script File data file
OGS Origons Movie Data File data file
OGV Ogg Video File video file
OGW Origin Workbook File Spreadsheet file
OGWU Origin Unicode Workbook File Spreadsheet file
OGX Ogg Vorbis Multiplexed Media File video file
OGZ Cube 2 Map File game files
OIF Origin Import Filter File settings file
OIS Origin Analyses Theme File settings file
OIV OpenIV Mod Package File plugin file
OKT Oktalyzer Module audio file
OL Valve Hammer Object Layout File 3D image file
OLA Online Access File page layout file
OLB OLE Object Library Other files
OLB OrCAD Symbol Library File CAD file
OLD Backup File backup file
OLK Outlook Address Book File data file
OLK14CATEGORY Outlook Category File data file
OLK14CONTACT Outlook Contact File data file
OLK14EVENT Outlook Calendar Event File data file
OLK14GROUP Outlook Group File data file
OLK14MAILACCOUNT Outlook Mail Account File data file
OLK14MESSAGE Outlook Message File data file
OLK14MSGATTACH Outlook 2011 Email Message Attachment File data file
OLK14MSGSOURCE Outlook Email Message Data File data file
OLK14NOTE Outlook Note File data file
OLK14PREF Outlook Preferences File settings file
OLK14SIGNATURE Outlook Signature File data file
OLK14TASK Outlook Task File data file
OLK15MSGATTACH Outlook 2016 Email Message Attachment File data file
OLL TrialDirector Object Load List data file
OLM Mac Outlook Database File data file
OLP Office Live Package web file
OLT Orbit Downloads List data file
OMA Sony OpenMG Music File audio file
OMCS Office Manager Access File data file
OMF Open Media Framework File audio file
OMF OMF Interchange Image File raster image file
OMG Image File disk image file
OMG OpenMG Audio File audio file
OMO OMake Object File developer files
OMOD Oblivion Mod Archive game files
OMP Office Manager Document Archive data file
OMP OpenMind Windows Document page layout file
OMS HP Printer Substrate Presets Package File settings file
OMX OtsAV Media Library Information File audio file
OND Lotus Notes Encapsulated Memo File data file
ONE OneNote Document data file
ONEPKG Microsoft OneNote Package File backup file