List of filename extensions / O
This list contains common file name extensions that are used in some operating systems to differentiate between file formats . In other operating systems, file type identification is mainly carried out using the file header, and the MIME type is more important than the file name extension for e-mail attachments . Systems that use the latter two approaches usually ignore the extension completely.
| Filename extension | MIME type | Full name | Remarks, usage |
|---|---|---|---|
| .O | application / octet-stream | Object | Object file (Unix) |
| .o2c | Object 2 lake | ||
| .o7o | o pen 7 x0. o rg install file | Installation file in .tar.bz2 format for the Gigaset M7x0 device series | |
| .oab | application / oda | MS Outlook | Outlook offline address book (in conjunction with MS Exchange server) |
| .obd | MS Office Binder File | - | |
| .obj | Object | Object file ( DOS , Windows , OS / 2 ) | |
| .obj | Graphics file from Tgif | ||
| .obml | Opera Binary Markup Language | Web pages saved by Opera Mini | |
| .oct | VIP instruction set | VIP | |
| .ocx | Program expansion | Microsoft OLE custom controls | |
| .odb | application / vnd.oasis.opendocument.database | OpenDocument Database | OASIS database file * |
| .odc | OpenDocument Chart | OASIS diagram document * | |
| .odf | application / vnd.oasis.opendocument.formula | OpenDocument Formula | OASIS formula document * |
| .odg | application / vnd.oasis.opendocument.graphics | OpenDocument Graphics | OASIS drawing document * |
| .odi | OpenDocument Image | OASIS image file * | |
| .odm | application / vnd.oasis.opendocument.text-master | OpenDocument Master | OASIS global document * |
| .odp | application / vnd.oasis.opendocument.presentation | OpenDocument Presentation | OASIS presentation document * |
| .ods | application / vnd.oasis.opendocument.spreadsheet | OpenDocument Spreadsheet | OASIS table document * |
| .odt | application / vnd.oasis.opendocument.text | OpenDocument Text | OASIS text document * (also KWord , AbiWord and TextMaker 2005; Open Office from version 2.0) |
| .ofc | Open Financial Connectivity | Financial file, for transferring data e.g. B. from a bank account into a financial application | |
| .off | Object File Format | Description of polygons in scientific software | |
| .ofr | OptimFROG | losslessly compressing audio format | |
| .often | MS Outlook | Outlook Format Template | |
| .ofx | Open Financial Exchange | Open file format for financial data exchange | |
| .oga | audio / ogg | Ogg Audio | Free container format for audio stream data, in the case of this file name extension it contains (Ogg) Vorbis audio |
| .ogg | audio / ogg | Ogg | Free container format for video and audio stream and metadata, in the case of this filename extension mostly contains (Ogg) Vorbis audio |
| .ogm | Ogg Media | free container format for video and audio stream and metadata (not official) | |
| .ogv | video / ogg | Ogg video | Free container format for video and audio stream and metadata, contains at least Theora -Video in the case of this filename extension |
| .ogx | application / ogg | Ogg Application | free container format for application / ogg |
| .oct | Oct alyzer | Track module ( music format ) of the Amiga octalyzer | |
| .oil | oil | ProductView 3D Viewer Part File from PTC | |
| .old | old | Backup file; like .bak | |
| .olk | - | Address book (MS Outlook) | |
| .granny | OpenMG Audio | Compressed audio format from Sony that can be easily converted to MP3 (see tools at OpenMG article) | |
| .omg | O&O DiskImage Disk Image | Image format from O&O DiskImage | |
| .one | OneNote | Screen clipping from Microsoft OneNote (part of some Office versions) | |
| .OPJ | - | OrCad Project File / Origin Project File (OriginLab) | |
| .opt | - | Workspace configuration file under C ++ | |
| .or # | Lotus Organizer file | # = Organizer version (4-6) | |
| .orf | Olympus Raw File | Raw data file of digital Olympus - SLR | |
| .organ | (Virtual) organ description file | Function list for the virtual organs ( sample collection management ) MyOrgan and GranOrgue | |
| .east | MS Outlook | Outlook offline synchronization file (similar to .pst) | |
| szo | su! beatmap Zipo | p-compressed folder that contains all data from an osu! beatmap contains i | |
| .otf | OpenType font | Font file with Postscript outlines | |
| .otg | ODoc. Template drawing | OASIS drawing document template * | |
| .oth | ODoc. Template HTML | OASIS HTML document template * | |
| .otp | ODoc. Template presentation | OASIS presentation document template * | |
| .otrkey | Otrkey File | Coded video file of the OnlineTV recorder ( http://www.onlinetvrecorder.com/ ) | |
| .ots | ODoc. Template spreadsheet | OASIS table document template * | |
| .ott | ODoc. Template text | OASIS text document template * (also KWord , AbiWord and TextMaker 2005) | |
| .out | - | Executable (Linux) | |
| .ova | Octava file | Sheet music format by Obtiv Octava | |
| .ovl | Vector data overlay | Top50 | |
| .ovl | Overlay | WordStar | |
| .oxps | application / oxps | XML Paper Specification | Replaces the previously used XPS format since Windows 8. |
*) StarOffice from version 8 or OpenOffice.org from version 2.0 (reading already from version 1.1.5).