File Extensions Abbreviations and Acronyms

1. .OLK14GROUP
   Outlook Group File
2. .OLK14MAILACCOUNT
   Outlook Mail Account File
3. .OLK14MSGSOURCE
   Outlook Email Message Data File
4. .OLK14NOTE
   Outlook Note File
5. .OLK14SIGNATURE
   Outlook Signature File
6. .OP2
   Nastran Output File
7. .OP4
   Nastran Output File
8. .OPAX
   Microsoft Office User Settings File
9. .OR4
   Ibm Lotus Organizer 97 Gs File
10. .OR5
    Lotus Organizer 5 File
11. .OVOLOG
    Oovoo Log File
12. .PART00000
    Winoptimizer Split Archive Part 1
13. .PATRAN.HRD
    Patran Hardcopy File
14. .PGDATA
    Penguin George Data File
15. .PNPT
    Programmer's Notepad Project Template
16. .POSTAL
    Tomtom Postal Code File
17. .PRO5TEMPLATEBUNDLE
    Propresenter 5 Template Bundle
18. .PROJECTPROPERTIES
    Alpha Five Project Properties File
19. .PSFLIB
    Playstation Sound Format Library
20. .PSFLIB2
    Playstation Sound Format Library

Last updated: March 20, 2022 — Total entries: 12,444