| 0 |
.O file extension |
Object |
| 1 |
.OCX file extension |
ActiveX Control |
| 2 |
.ODF file extension |
Open Document Interchange Format (ODIF) |
| 3 |
.ODG file extension |
OpenDocument Drawing |
| 4 |
.ODS file extension |
OpenDocument Spreadsheet |
| 5 |
.ODT file extension |
ODF Text Document |
| 6 |
.OFX file extension |
Open Financial Exchange Format |
| 7 |
.OGG file extension |
Ogg Vorbis Audio |
| 8 |
.OGV file extension |
Ogg Vorbis Video |
| 9 |
.OLD file extension |
Backup |
| 10 |
.ONE file extension |
Microsoft OneNote Document |
| 11 |
.ONEPKG file extension |
Microsoft OneNote Package |
| 12 |
.OPML file extension |
OPML Outline Processor Markup Language File Format |
| 13 |
.ORF file extension |
Olympus Digital Camera Raw Image File |
| 14 |
.OTF file extension |
OpenType Font File Format |
| 15 |
.OTT file extension |
OpenOffice.org Text Document Template |
| 16 |
.OVA file extension |
Open Virtual Machine Format |
| 17 |
.OXPS file extension |
Windows 8 OpenXPS Document |
| 18 |
.O01 file extension |
Typhoon Voice |
| 19 |
.O2C file extension |
Objects To See 3D File Format |
| 20 |
.O3D file extension |
Google Open 3D Web Graphic Format |
| 21 |
.O8D file extension |
OCTGN Deck |
| 22 |
.O8G file extension |
OCTGN Game Definition |
| 23 |
.O8O file extension |
Mediator 5 Repository Tabs Vorlagen.006 |
| 24 |
.O8S file extension |
OCTGN Set |
| 25 |
.OA0 file extension |
B.O.U.T. Evolution Texture |
| 26 |
.OA2 file extension |
Fujitsu OASYS 2 Document |
| 27 |
.OA3 file extension |
OASYS 3 Document |
| 28 |
.OAB file extension |
Microsoft Outlook Offline Address Book |
| 29 |
.OAD file extension |
Suite Notaro Document |
| 30 |
.OAF file extension |
ETH Oberon Applet |
| 31 |
.OAM file extension |
Adobe Edge Overlay |
| 32 |
.OAP file extension |
Samsung Bada Signed Installation Package |
| 33 |
.OAR file extension |
HSQLDB Database |
| 34 |
.OAS file extension |
Fujitsu OAS Document |
| 35 |
.OAT file extension |
Google Android RunTime Code |
| 36 |
.OAV file extension |
Microsoft Flight Simulator Texture |
| 37 |
.OAW file extension |
OpenArchitectureWare Workflow |
| 38 |
.OAZ file extension |
NetFax Manager OAZ Fax Image |
| 39 |
.OB file extension |
IBM LinkWay Object |
| 40 |
.OB! file extension |
Orbit Downloader Incomplete Download |
| 41 |
.OB3 file extension |
ABF Software Outlook Backup Backup |
| 42 |
.OB5 file extension |
TopLang OE Backup |
| 43 |
.OBAK file extension |
WinSQL Offline Backup |
| 44 |
.OBB file extension |
Google Android Opaque Binary Blob |
| 45 |
.OBC file extension |
AICON 3D Scanner Photogrammetry |
| 46 |
.OBD file extension |
Microsoft Office Binder Document |
| 47 |
.OBF file extension |
OsmAnd Offline GPS Vector Maps |
| 48 |
.OBG file extension |
ZBrush Mesh |
| 49 |
.OBI file extension |
Microsoft Outlook 2007/2010/2013 RSS Subscription |
| 50 |
.OBJ file extension |
Intel (Object Module Format) Relocatable Object Module |
| 51 |
.OBJECTCACHE file extension |
Cache |
| 52 |
.OBJX file extension |
Metatools Object Bryce Support |
| 53 |
.OBK file extension |
OrCAD Capture Design Or Library |
| 54 |
.OBL file extension |
TrueSpace |
| 55 |
.OBML file extension |
Opera Mini Saved Web Page |
| 56 |
.OBML15 file extension |
Opera Mini 5.1 Saved Web Page |
| 57 |
.OBPACK file extension |
ObjectBar Theme Pack |
| 58 |
.OBR file extension |
Borland C++ Object Browser Data |
| 59 |
.OBS file extension |
WAsP Obstacle List |
| 60 |
.OBT file extension |
Microsoft Office Binder Template |
| 61 |
.OBV file extension |
3D Photo Browser Thumbnail Cache |
| 62 |
.OBW file extension |
Toontrack Superior Drummer Audio |
| 63 |
.OBX file extension |
Rational XDE |
| 64 |
.OBY file extension |
EPOC ROM Image |
| 65 |
.OBYX file extension |
Obyx Control |
| 66 |
.OBZ file extension |
Microsoft Office Binder Wizard |
| 67 |
.OC9 file extension |
OrgCon Organization |
| 68 |
.OCA file extension |
Visual Basic Control Typelib Cache |
| 69 |
.OCAMLMAKEFILE file extension |
Caml Programming Language Makefile |
| 70 |
.OCB file extension |
Origin Precompiled Origin C |
| 71 |
.OCC file extension |
DB/TextWorks Terms And Words Database |
| 72 |
.OCD file extension |
OCAD Digitized Map |
| 73 |
.OCDC file extension |
Mathematica Document |
| 74 |
.OCDF file extension |
OneClickDigital Mp3 Audio Book |
| 75 |
.OCE file extension |
Open Catalog Extension Connection |
| 76 |
.OCEN file extension |
EdGCM Data |
| 77 |
.OCF file extension |
OM2 Cipher |
| 78 |
.OCG file extension |
Osprey Custom Graph |
| 79 |
.OCH file extension |
Satellite And Channel Settings Backup |
| 80 |
.OCI file extension |
OpenCanvas Image |
| 81 |
.OCM file extension |
Netscape Communicator Aim |
| 82 |
.OCP file extension |
Advanced Art Studio Image |
| 83 |
.OCR file extension |
FaxGrapper FAX Transcribed Text |
| 84 |
.OCS file extension |
EDoc DigiSign Digitally Signed Document |
| 85 |
.OCT file extension |
RADIANCE Octree Format |
| 86 |
.OCV file extension |
OCV Training Data |
| 87 |
.OCW file extension |
Oracle Configuration Watch Template |
| 88 |
.OC_ file extension |
Compressed ActiveX Control |
| 89 |
.OD file extension |
Mascotte Mascopt Request |
| 90 |
.OD1 file extension |
Omnis 5 Database |
| 91 |
.OD2 file extension |
Omnis 5 Database |
| 92 |
.OD3 file extension |
Omnis Studio Database |
| 93 |
.OD4-9 file extension |
Omnis5 Database |
| 94 |
.ODA file extension |
CALS Group IV Type 2 Raster Image |
| 95 |
.ODB file extension |
ArcView Object Database ASCII |
| 96 |
.ODC file extension |
OpenOffice.org OpenDocument |
| 97 |
.ODCCUBEFILE file extension |
OpenDocument 1 |
| 98 |
.ODCNEWFILE file extension |
Microsoft Office Data Connection |
| 99 |
.ODCTABLEFILE file extension |
Microsoft Office |
| 100 |
.ODD file extension |
Coby Voice Recorder Format |
| 101 |
.ODE file extension |
Microsoft Office |
| 102 |
.ODEX file extension |
Google Android Optimized Executalbe |
| 103 |
.ODH file extension |
Microsoft Visual Studio Interface Definition Language |
| 104 |
.ODI file extension |
OpenOffice.org Image |
| 105 |
.ODIF file extension |
Open Document Interchange Format |
| 106 |
.ODL file extension |
Visual C++ ODL Type Library Source |
| 107 |
.ODM file extension |
OpenOffice.org OpenDocument Global Text Document |
| 108 |
.ODN file extension |
Fluke Power Analyze Database |
| 109 |
.ODO file extension |
ICUBE Online Operating System Write Document |
| 110 |
.ODP file extension |
OpenOffice.org OpenDocument Presentation |
| 111 |
.ODR file extension |
HMI Builder Report |
| 112 |
.ODT# file extension |
OpenOffice.org Locked Document |
| 113 |
.ODTPC file extension |
Oracle User Productivity Kit Presentation |
| 114 |
.ODTTF file extension |
Microsoft Office Document Embedded Font |
| 115 |
.ODV file extension |
Ocean Data View Data |
| 116 |
.ODVI file extension |
LaTeX |
| 117 |
.ODX file extension |
Microsoft BizTalk Server Diagram |
| 118 |
.ODZ file extension |
IBM OpenDoc Editor Package |
| 119 |
.OD_ file extension |
Oracle Compressed Driver |
| 120 |
.OEACCAOUNT file extension |
Windows Mail |
| 121 |
.OEACCOUNT file extension |
Windows Mail Account Settings |
| 122 |
.OEB file extension |
Outlook Express Backup Wizard |
| 123 |
.OECL file extension |
Open EDA Component Library |
| 124 |
.OEDB file extension |
Microsoft Email Database |
| 125 |
.OEF file extension |
Optim Export |
| 126 |
.OEM file extension |
OEM Install Data |
| 127 |
.OEMIGACCOUNT file extension |
Outlook Express Temporary |
| 128 |
.OER file extension |
AU OER TOOLS Project |
| 129 |
.OET file extension |
ESignal Order Entry Ticket |
| 130 |
.OEX file extension |
Opera Add-on |
| 131 |
.OFA file extension |
Kodak OfotoNow |
| 132 |
.OFB file extension |
Oxygen Forensic Suite Backup |
| 133 |
.OFC file extension |
Open Financial Connectivity Format |
| 134 |
.OFD file extension |
ObjectView Form Definition |
| 135 |
.OFF file extension |
DEC 3D Object File Format |
| 136 |
.OFFICEUI file extension |
Microsoft Office UI Customization |
| 137 |
.OFFSETS file extension |
Offset |
| 138 |
.OFL file extension |
OtsTurntables Playlist |
| 139 |
.OFM file extension |
Adobe PostScript Font Description |
| 140 |
.OFN file extension |
MS Office File New (Other Office Documents) |
| 141 |
.OFP file extension |
Objecteering Project |
| 142 |
.OFR file extension |
OptimFROG Encoded Audio |
| 143 |
.OFS file extension |
OptimFROG Dualstream |
| 144 |
.OFT file extension |
Microsoft Outlook Template |
| 145 |
.OG file extension |
Atari Jaguar GPU (TOM) Object Code |
| 146 |
.OGA file extension |
Ogg Vorbis Audio Profile |
| 147 |
.OGC file extension |
Organica Document File Format |
| 148 |
.OGD file extension |
Oracle Forms Graph |
| 149 |
.OGF file extension |
OnkoS Graphic |
| 150 |
.OGF2 file extension |
MapViewGPS Map Coordinates |
| 151 |
.OGL file extension |
ATI Overlay Source Code |
| 152 |
.OGM file extension |
Ogg Vorbis Media |
| 153 |
.OGNC file extension |
Dynamic Web Page |
| 154 |
.OGO file extension |
Origin Graphic Object |
| 155 |
.OGR file extension |
OGR C++ Open Source Library |
| 156 |
.OGS file extension |
Origons Movie List |
| 157 |
.OGW file extension |
OriginLab Worksheet |
| 158 |
.OGX file extension |
Microsoft C++ Component Gallery Exported Classes And Resources |
| 159 |
.OGZ file extension |
Cube 2 Sauerbraten Map |
| 160 |
.OH file extension |
DrillAssistant List |
| 161 |
.OH4 file extension |
Overhoor List |
| 162 |
.OHI file extension |
Openhelp |
| 163 |
.OHP file extension |
MS-DOS 7 |
| 164 |
.OHS file extension |
Bink Outbound History |
| 165 |
.OHW file extension |
Overhoor DrillAssistant List |
| 166 |
.OID file extension |
HP ProCurve Manager Network Device |
| 167 |
.OIF file extension |
QuickBase Web-sharable Database Interchange |
| 168 |
.OIL file extension |
Open Image Library Format Image Format |
| 169 |
.OIT file extension |
SleepScan And Ceegraph Offset Index |
| 170 |
.OJ file extension |
Atari Jaguar DSP (JERRY) Object Module |
| 171 |
.OJP file extension |
3WayPack |
| 172 |
.OK file extension |
QEDIT |
| 173 |
.OKF file extension |
OKF Font File Format |
| 174 |
.OKM file extension |
OkMap Map Defining |
| 175 |
.OKOZO file extension |
Okozo Desktop Animation |
| 176 |
.OKR file extension |
PowerRecover One Key Recovery |
| 177 |
.OKS file extension |
OKScript |
| 178 |
.OKT file extension |
Oktalyzer Music Module (MOD) |
| 179 |
.OKX file extension |
OKScript |
| 180 |
.OL file extension |
Valve Hammer Object Layout |
| 181 |
.OLB file extension |
Microsoft Office OLE Object Library |
| 182 |
.OLB2 file extension |
CanOpener Library |
| 183 |
.OLE file extension |
Microsoft Object Linking And Embedding |
| 184 |
.OLE2 file extension |
Microsoft Office Binary Document Container Format |
| 185 |
.OLF file extension |
OyezForms Legal Documents |
| 186 |
.OLK file extension |
Microsoft Outlook Address Book |
| 187 |
.OLK14CATEGORY file extension |
Microsoft Outlook 2011 For Mac Category |
| 188 |
.OLK14CONTACT file extension |
Microsoft Outlook 2011 For Mac Contact |
| 189 |
.OLK14DBHEADER file extension |
Microsoft Outlook 2011 For Mac Database |
| 190 |
.OLK14FOLDER file extension |
Microsoft Outlook 2011 For Mac Folder |
| 191 |
.OLK14MAILACCOUNT file extension |
Microsoft Outlook 2011 For Mac Mail Account Settings |
| 192 |
.OLK14MESSAGE file extension |
Microsoft Outlook 2011 For Mac Message |
| 193 |
.OLK14MSGATTACH file extension |
Microsoft Outlook 2011 For Mac Message Attachment |
| 194 |
.OLK14MSGSOURCE file extension |
Microsoft Outlook 2011 For Mac Message Source |
| 195 |
.OLK14PREF file extension |
Microsoft Outlook 2011 For Mac Preferences |
| 196 |
.OLK14RECENT file extension |
Microsoft Outlook 2011 For Mac Recent Address |
| 197 |
.OLK14RULE file extension |
Microsoft Outlook 2011 For Mac Rule |
| 198 |
.OLK14SCHEDULE file extension |
Microsoft Outlook 2011 For Mac Schedule |
| 199 |
.OLK14SEARCH file extension |
Microsoft Outlook 2011 For Mac Saved Search |
| 200 |
.OLK14SIGNATURE file extension |
Microsoft Outlook 2011 For Mac Signature |
| 201 |
.OLK14UID file extension |
Microsoft Outlook 2011 For Mac UID |
| 202 |
.OLL file extension |
TrialDirector Load |
| 203 |
.OLM file extension |
Microsoft Outlook For Mac Data |
| 204 |
.OLN file extension |
Microsoft Visual C++ Outline Examples |
| 205 |
.OLPROJ file extension |
Adobe OnLocation |
| 206 |
.OLS file extension |
Microsoft Office List Shortcut |
| 207 |
.OLT file extension |
Orbit Downloader Download List |
| 208 |
.OLV file extension |
Roller Coaster Tycoon |
| 209 |
.OLY file extension |
AFP Advanced Function Presentation Overlay Resource |
| 210 |
.OMA file extension |
Sony OpenMG Music Format |
| 211 |
.OMB file extension |
Omnibus Offline Web Storage |
| 212 |
.OMC file extension |
Sony Music Store ATRAC3 Audio |
| 213 |
.OMD file extension |
MapInfo Routing J Server Data |
| 214 |
.OMEG file extension |
Mathematica For Mac |
| 215 |
.OMF file extension |
OMF Operation, Management & Finance Database |
| 216 |
.OMFI file extension |
Open Media Framework |
| 217 |
.OMG file extension |
O&O DiskImage Backup |
| 218 |
.OML file extension |
TracePro Model |
| 219 |
.OMN file extension |
Omnipotent Collection |
| 220 |
.OMO file extension |
OMake Object |
| 221 |
.OMOD file extension |
Oblivion Mod Manager Mod |
| 222 |
.OMP file extension |
OpenMind Project |
| 223 |
.OMR file extension |
OMR Template |
| 224 |
.OMS file extension |
Order Maven |
| 225 |
.OMT file extension |
SITH HLA Object Model Template |
| 226 |
.OMW file extension |
Omweso |
| 227 |
.OMX file extension |
OtsAV Media Library Information |
| 228 |
.OMZ file extension |
Market Data |
| 229 |
.ON2 file extension |
On2 Encoded FLV |
| 230 |
.OND file extension |
Lotus Notes |
| 231 |
.ONEBIN file extension |
OneNote |
| 232 |
.ONECACHE file extension |
Microsoft OneNote Cache |
| 233 |
.ONETMP file extension |
Microsoft OneNote Temporary |
| 234 |
.ONETOC file extension |
Microsoft OneNote Table Of Contents |
| 235 |
.ONETOC2 file extension |
Microsoft OneNote Table Of Contents |
| 236 |
.ONLINERESOURCES file extension |
Online Resources |
| 237 |
.ONM file extension |
Outdoor Navigator Map |
| 238 |
.ONPF file extension |
Apple DocViewer |
| 239 |
.ONT file extension |
TheWord Module |
| 240 |
.ONTX file extension |
TheWord Encrypted Module |
| 241 |
.ONW file extension |
Omron HMI NTST |
| 242 |
.ONX file extension |
OnyxGrass Image |
| 243 |
.OO3 file extension |
Omni Group Outliner 3 |
| 244 |
.OOB file extension |
Steel Panthers World At War |
| 245 |
.OOG file extension |
PyGraph Python Graphics Interface Object Oriented Graphics |
| 246 |
.OOGL file extension |
Geomview Object Oriented Graphics Library |
| 247 |
.OOK file extension |
Arachne Batch Script |
| 248 |
.OOM file extension |
Shroom Swap |
| 249 |
.OOP file extension |
OOP Packer Archive |
| 250 |
.OOPS file extension |
Oops |
| 251 |
.OOS file extension |
OpenOffice.org Spreadsheet |
| 252 |
.OOT file extension |
OpenOffice.org Text |
| 253 |
.OP file extension |
ESignal OptionsPlus |
| 254 |
.OP2 file extension |
Outpost 2 Saved Game |
| 255 |
.OP4 file extension |
Nastran Output |
| 256 |
.OPA file extension |
Psion OPL Object |
| 257 |
.OPAL file extension |
Microsoft Office Customization Tool (OCT) Language-specific Settings |
| 258 |
.OPAX file extension |
Microsoft Office Customization Tool (OCT) Standard Settings |
| 259 |
.OPB file extension |
Bryce Object |
| 260 |
.OPC file extension |
Microsoft Office 97 Upgrade Control |
| 261 |
.OPD file extension |
Durango Interferometry Software Document |
| 262 |
.OPDOWNLOAD file extension |
Opera Next Incomplete Download |
| 263 |
.OPEF file extension |
OmniPass Encrypted Folder |
| 264 |
.OPENBSD file extension |
OpenBSD Readme |
| 265 |
.OPENTAG file extension |
OpenTag |
| 266 |
.OPF file extension |
FlipAlbum Album |
| 267 |
.OPG file extension |
Offline Plan Generation Package |
| 268 |
.OPH file extension |
Clipboard |
| 269 |
.OPI file extension |
Adlib OCR Processing Information |
| 270 |
.OPJ file extension |
OrCAD Capture Project |
| 271 |
.OPK file extension |
Sinking Island/LIle Noyée Game |
| 272 |
.OPL file extension |
Psion OPL Language Source Code |
| 273 |
.OPLC file extension |
Nokia Logo |
| 274 |
.OPLM file extension |
Outline Processor Markup Language |
| 275 |
.OPN file extension |
Court Opinion |
| 276 |
.OPO file extension |
Psion OPL Object |
| 277 |
.OPP file extension |
IPhotoDVD |
| 278 |
.OPPC file extension |
Space Marine Game Resource Package |
| 279 |
.OPQ file extension |
Eschalon: Book I Game |
| 280 |
.OPR file extension |
OPRO X Browser |
| 281 |
.OPS file extension |
Microsoft Office Profile Settings |
| 282 |
.OPT file extension |
Digital Line Graph Optional Vector Data |
| 283 |
.OPTIONS file extension |
Eclipse IDE Trace Options |
| 284 |
.OPTS file extension |
Linux Configuration Options |
| 285 |
.OPUS file extension |
Opus Audio |
| 286 |
.OPV file extension |
OpenPanorama Visit |
| 287 |
.OPW file extension |
OrgPlus For Windows Organization Chart |
| 288 |
.OPX file extension |
Microsoft Office Organization Chart File Format |
| 289 |
.OPXT file extension |
OrpPlus Template |
| 290 |
.OPY file extension |
OptiY Model |
| 291 |
.OPZ file extension |
OPTech |
| 292 |
.OP_ file extension |
GKSetup Support |
| 293 |
.OQY file extension |
Microsoft Excel OLAP Query |
| 294 |
.OR2 file extension |
Lotus Organizer 2 |
| 295 |
.OR3 file extension |
IBM Lotus Organizer 97 |
| 296 |
.OR4 file extension |
Lotus Organizer Data |
| 297 |
.OR5 file extension |
IBM Lotus Organizer |
| 298 |
.OR6 file extension |
Lotus Organizer Data |
| 299 |
.OR8 file extension |
Rational Rose Oracle8 Database Model Report |
| 300 |
.ORA file extension |
Oracle Database Parameter Configuration |
| 301 |
.ORB file extension |
Evanidus Data |
| 302 |
.ORC file extension |
Oracle 7 Script |
| 303 |
.ORD file extension |
OMAX Routed Data File |
| 304 |
.ORDEREDTEST file extension |
Microsoft Visual Studio Ordered Test |
| 305 |
.ORE file extension |
Narbacular Drop Game Content |
| 306 |
.ORG file extension |
SoundBlaster Pro Organ Files |
| 307 |
.ORG2+ file extension |
Lotus Organizer |
| 308 |
.ORI file extension |
Need For Speed - Hot Pursuit |
| 309 |
.ORIG file extension |
Original |
| 310 |
.ORIGINAL file extension |
Netobjects Fusion Components Bbscomp Message |
| 311 |
.ORIGINAL_EPUB file extension |
EPUB Ebook Backup |
| 312 |
.ORIGINAL_MOBI file extension |
MOBI Ebook Backup |
| 313 |
.ORK file extension |
Warhammer Mark Of Chaos Game Archive |
| 314 |
.ORL file extension |
Object-Relational Language |
| 315 |
.ORMDESIGNER file extension |
ORM Designer Project |
| 316 |
.ORP file extension |
WinSLAM |
| 317 |
.ORQ file extension |
Online Certificate Status Protocol (OCSP) Request |
| 318 |
.ORS file extension |
Online Certificate Status Protocol |
| 319 |
.ORT file extension |
COREX Orthographic Transcriptions |
| 320 |
.ORV file extension |
Oracom Video |
| 321 |
.ORX file extension |
RadiantOne Virtual Directory Server Database Schema |
| 322 |
.ORZ file extension |
Holic Game |
| 323 |
.OS2 file extension |
Os2 System |
| 324 |
.OS3 file extension |
OS/2 Warp 3 |
| 325 |
.OSA file extension |
W32/Sober-AD |
| 326 |
.OSAS file extension |
Apple Script Library Tani Script |
| 327 |
.OSAX file extension |
FindFile OSAX Mac File Type |
| 328 |
.OSB file extension |
Sega Dreamcast Sounds |
| 329 |
.OSBX file extension |
OneSafe Exported Backup |
| 330 |
.OSC file extension |
Formula One 2001 Options |
| 331 |
.OSCD file extension |
TouchOSC Interface Editor Template |
| 332 |
.OSD file extension |
Open Software Description |
| 333 |
.OSDX file extension |
Microsoft Windows Search Connector |
| 334 |
.OSF file extension |
Descent 3 Sound |
| 335 |
.OSG file extension |
OSGJS JSON Input |
| 336 |
.OSI file extension |
Osiris Database |
| 337 |
.OSK file extension |
Osu! Skin |
| 338 |
.OSL file extension |
OckamSoft Log |
| 339 |
.OSM file extension |
OpenStreetMap Data |
| 340 |
.OSP file extension |
Crystal Semiconductor Driver Data |
| 341 |
.OSR file extension |
Osu! Game Replay |
| 342 |
.OSS file extension |
Microsoft Office Saved Search |
| 343 |
.OST file extension |
Microsoft Outlook Inbox Off-line Folder |
| 344 |
.OSU file extension |
Osu! Dialog |
| 345 |
.OSW file extension |
ONESWING Contents |
| 346 |
.OSX file extension |
Apple Mac OS PowerPC Executable |
| 347 |
.OSZ file extension |
Osu! Beatmap |
| 348 |
.OT file extension |
Atari Jaguar (TOM) Object Code |
| 349 |
.OTA file extension |
OTA Bitmap |
| 350 |
.OTB file extension |
Nokia OTA Bitmap |
| 351 |
.OTC file extension |
OpenDocument Chart Template |
| 352 |
.OTD file extension |
OpenIV Texture Data |
| 353 |
.OTG file extension |
OpenOffice.org Graphics Document Template |
| 354 |
.OTH file extension |
Microsoft PowerToys Explorer Tool |
| 355 |
.OTI file extension |
OpenDocument Image Template |
| 356 |
.OTL file extension |
Super NoteTab Template |
| 357 |
.OTLB file extension |
Microsoft OLE Type File For Mac |
| 358 |
.OTLN file extension |
Opal Outline |
| 359 |
.OTM file extension |
Microsoft Outlook Macro |
| 360 |
.OTP file extension |
Origin Graphic Template |
| 361 |
.OTR file extension |
IRIX Complied FTR |
| 362 |
.OTRKEY file extension |
OTRKEY Encoded Video |
| 363 |
.OTS file extension |
OpenOffice.org OpenDocument Spreadsheet Template |
| 364 |
.OTV file extension |
Rotor-Disc OTV Kit OTV Calibration |
| 365 |
.OTX file extension |
TheWord Encrypted Module |
| 366 |
.OTZ file extension |
OpenLP Theme |
| 367 |
.OUT file extension |
Output |
| 368 |
.OUTLINE file extension |
FontTwister Letter Outline |
| 369 |
.OUTLOOK97 file extension |
Microsoft Outlook Custom Mail |
| 370 |
.OUX file extension |
Bibexcel |
| 371 |
.OV file extension |
OpenInsight Database Overflow |
| 372 |
.OV0 file extension |
Objective Voice E-mail For Windows |
| 373 |
.OV1 file extension |
Overlay |
| 374 |
.OV2 file extension |
Overlay |
| 375 |
.OV3 file extension |
Overlay |
| 376 |
.OV4 file extension |
Overlay |
| 377 |
.OV5 file extension |
Overlay |
| 378 |
.OVB file extension |
OnkoS Vocabulary Backup |
| 379 |
.OVD file extension |
ObjectVision Data |
| 380 |
.OVE file extension |
Overture Music Score |
| 381 |
.OVF file extension |
Open Virtualization Format Package |
| 382 |
.OVG file extension |
ObjectVision Converted Graphic |
| 383 |
.OVH file extension |
OMSI Bus Settings |
| 384 |
.OVL file extension |
RollerCoaster Tycoon 3 Sprite |
| 385 |
.OVM file extension |
BHV Tonstudio |
| 386 |
.OVOLOG file extension |
OoVoo Log |
| 387 |
.OVPN file extension |
OpenVPN Config |
| 388 |
.OVR file extension |
Overlay |
| 389 |
.OVS file extension |
Ovation 1 Style Sheet |
| 390 |
.OVW file extension |
Cool Edit Pro Overview |
| 391 |
.OVX file extension |
Psion Oval Control |
| 392 |
.OW file extension |
Free Pascal For Windows Object |
| 393 |
.OWC file extension |
OutWit Hub OutWit Catch Db Format |
| 394 |
.OWD file extension |
OpenWire Project |
| 395 |
.OWG file extension |
OutWit Hub OutWit Gear Outwit Thesaurus Db |
| 396 |
.OWL file extension |
OWL (Obfuscated Weird Language) Source Code |
| 397 |
.OWM file extension |
OutWit Hub OutWit Mashup XML Format |
| 398 |
.OWR file extension |
PeopleSoft Results Archive |
| 399 |
.OWS file extension |
Web Studio Project |
| 400 |
.OWT file extension |
Ancestry.com OneWorldTree |
| 401 |
.OX file extension |
Ox Object-oriented Matrix Programming Language |
| 402 |
.OX2 file extension |
Orangutan X2 Firmware Update |
| 403 |
.OXD file extension |
PS3 Proxy Server |
| 404 |
.OXE file extension |
Pulsar/SCOPE Z.matrix |
| 405 |
.OXF file extension |
IBM Rational Rhapsody |
| 406 |
.OXM file extension |
Ogg Compressed Xm |
| 407 |
.OXO file extension |
Ox Object-Oriented Matrix Programming Language |
| 408 |
.OXR file extension |
Virus Safe Web Driver |
| 409 |
.OXT file extension |
OpenOffice.org Extension Help Format |
| 410 |
.OYX file extension |
IBM Lotus Approach Alternate Database Index |
| 411 |
.OYZ file extension |
Lotus Approach Alternate DBASE Index |
| 412 |
.OZ file extension |
Opera Job Management Compressed |
| 413 |
.OZD file extension |
Win32.TrojanDownloader.Agent.OZD Trojan |
| 414 |
.OZF2 file extension |
OziExplorer Map |
| 415 |
.OZFX3 file extension |
OziExplorer Image |
| 416 |
.OZJ file extension |
Mu Online Graphic |
| 417 |
.OZP file extension |
Sharp Organizer Telephone Bank |
| 418 |
.OZT file extension |
Mu Online Texture |
