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OPML File - What is it and how do I open it?
OPML is an acronym for Outline Processor Markup Language. The OPML file format is used to exchange information ...

OPT File - What is it and how do I open it?
Files that contain the .opt file extension are used by a variety of computer applications to store options fil ...

OPUS File - What is it and how do I open it?
The .opus file extension is used for an audio codec format that was created by the Internet Engineering Task F ...

ORG File - What is it and how do I open it?
Files that contain the .org file extension are most commonly used by the Lotus Organizer software application. ...

ORIG File - What is it and how do I open it?
Files that use the .orig file extension usually contain backup files. The .orig file extension is used to nota ...

OS File - What is it and how do I open it?
Developed by the makers of ObjectScript, the .os file extension can be referred to files that are distinguishe ...

OST File - What is it and how do I open it?
Files that contain the .ost file extension are used by the Microsoft Outlook email application. The OST files ...

OTRKEY File - What is it and how do I open it?
The .otrkey file extension is most commonly associated with the OnlineTVRecorder software application. OnlineT ...

OTS File - What is it and how do I open it?
The .ots file extension is most commonly used by the OpenOffice spreadsheet application. OpenOffice provides u ...

OTT File - What is it and how do I open it?
The .ott file extension is most commonly associated with the OpenOffice word processing application. Files end ...

OUT File - What is it and how do I open it?
Files that contain the .out file extension are used for generic output files. These files are used by a variet ...

OV2 File - What is it and how do I open it?
Files that contain the .ov2 file extension are most commonly associated with the TomTom GPS navigation device. ...

OVA File - What is it and how do I open it?
The .ova file extension is used to identify files that are designated as Open Virtualization Archive. OVA is a ...

OVPN File - What is it and how do I open it?
The .ovpn file extension is used for an open source configuration file format that was developed by Telethra, ...

OXPS File - What is it and how do I open it?
The OXPS file extension stands for Open XML Paper Specification, which is the most recent version of the XPS f ...

OXT File - What is it and how do I open it?
Files with the .oxt extension are most commonly associated with the OpenOffice software suite. OpenOffice prov ...

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