| File Extension: | OPO |
| File Type Description: | Psion OPL Object File |
| File Type Developer: | Psion PLC |
| Primary Associated Software: | Unknown Software |
| Primary Software Developer: | Unknown Developer |
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Unknown Developer developed the OPO file extension, also know as a Psion OPL Object File file, for the Unknown Software software package. User statistics infer that these OPO files are popular with users from United States and most frequently found on the Windows 10 platform. Frequently these users are visiting our web site using Google Chrome.
 | Unknown Software by Unknown Developer |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .HNB | Unknown Developer | Uncommon Files | Unknown File Type |
| .VMCZ | Unknown Developer | Uncommon Files | Uncommon File Extension |
| .BTX | SmartWare Corporation | Backup Files | SmartWare Backup Text File |
| .PVD | Varden Development | Data Files | Polygen3D Vector Descriptor |
| .CALC | Apple | Data Files | Golden Orchard Apple II CD Rom File |
| .QTA | Unknown Developer | Compressed Files | Qtar Archive |
| .ADRESSES | Apple | Data Files | Golden Orchard Apple II CD Rom File |
| .3M | Unknown Developer | Uncommon Files | Advent 3B2 Macro |
| .HM4 | Lorex Technology | Backup Files | Lorex Backup File |
| .CRN | Unknown Developer | Data Files | Tree Ring Data File |
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