The X
按字母分类：
extension name file type Classification
OBI Outlook RSS Subscription File settings file
OBT Openbox Theme File settings file
OCE Open Catalog Extension Connection File settings file
ODC Office Data Connection File settings file
ODT Origin Dialog Theme File settings file
OEM OEM Setup File settings file
OFFICEUI Microsoft Office UI Customization File settings file
OFP Origin Function Plot Theme File settings file
OIF Origin Import Filter File settings file
OIS Origin Analyses Theme File settings file
OLK14PREF Outlook Preferences File settings file
OMS HP Printer Substrate Presets Package File settings file
ONETOC Microsoft OneNote Table of Contents File settings file
ONETOC2 Microsoft OneNote Table of Contents File settings file
OPS Office Profile Settings File settings file
OPT Options File settings file
OPTIONS SE-SOFT Configuration File settings file
OPTS Linux Configuration Options File settings file
OSDX Search Connector Description File settings file
OSS Microsoft Outlook Saved Search File settings file
OTH Origin Graph Theme File settings file
OTM Origin Matrix Template settings file
OTMU Origin Unicode Matrix Template settings file
OTP Origin Graph Template settings file
OTPU Origin Unicode Graph Template settings file
OTW Origin Workbook Template settings file
OTWU Origin Unicode Workbook Template settings file
OTZ OpenLP Theme File settings file
OVPN OpenVPN Configuration File settings file