| File Extension: | OCS |
| File Type Description: | eDoc DigiSign Digitally Signed Document |
| File Type Developer: | Fujitsu Limited |
| Primary Associated Software: | digiSeal Reader |
| Primary Software Developer: | Secrypt |
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EDoc DigiSign Digitally Signed Document files are the most popular type of files to carry the OCS file extension, originally developed by Secrypt for digiSeal Reader. Data from our web servers (annonymous users) show that OCS files are most popular in United States and are often used by Windows 10. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | digiSeal Reader by Secrypt |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .P7S | Unknown Developer | Encoded Files | PKCS #7 Signature File Format |
| .ZVX | Rohde & Schwarz | Data Files | R&S VNA Setup Data |
| .DMR | Brain Innovation | Data Files | BrainVoyager Diffusion Weighted Project File |
| .KBN | TeamSpeak Systems | Data Files | TeamSpeak Keybinding File |
| .ST1 | Converge Horizons | Text Files | DigiTitle Master Subtitle File |
| .3 | IBM | Data Files | IBM Embedded ViaVoice Voice Type Languages Scripts Data |
| .RPN | Swiftpage, Inc. | Text Files | ACT! Report Data |
| .OEM | Microsoft Corporation | Settings Files | Original Equipment Manufacturer Setup File |
| .ROF | Autodesk, Inc. | Data Files | Autodesk Storm & Sanitary Analysis Data |
| .SSN | Samsung Electronics | Backup Files | Samsung Kies Notes Backup |
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