The X
按字母分类：
extension name file type Classification
OAB Offline Address Book data file
OBB Android Opaque Binary Blob File data file
OBD Office Binder Document data file
OBJ Relocatable Object Code data file
OCC Oceanic DataPool File data file
OCIMF OCIMF HVPQ File data file
OD Mascopt Graph Request File data file
ODC OpenDocument Chart File data file
ODF Open Document File data file
ODP OpenDocument Presentation data file
ODT OOMMF Data Table File data file
ODX BizTalk Server Orchestration File data file
OEACCOUNT Windows Mail Account File data file
OEM OEMEdit Save File data file
OFC Open Financial Connectivity File data file
OFM Melco Embroidery File data file
OFM OmniForm Form data file
OFT Outlook File Template data file
OFX Open Financial Exchange File data file
OGG Origin Graph File data file
OGGU Origin Unicode Graph File data file
OGM Origin Matrix File data file
OGMU Origin Unicode Matrix File data file
OGS Origin LabTalk Script File data file
OGS Origons Movie Data File data 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
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
OLT Orbit Downloads List data file
OMCS Office Manager Access File data file
OMP Office Manager Document Archive data file
OND Lotus Notes Encapsulated Memo File data file
ONE OneNote Document data file
ONT theWord Bible Text Module data file
ONTX theWord Encrypted Bible Text Module data file
OO3 OmniOutliner 3 File data file
OP OpenPAT Report data file
OP2 Nastran Output File data file