| File Extension: | NS4 |
| File Type Description: | Lotus Notes 4 Database |
| File Type Developer: | IBM |
| Primary Associated Software: | IBM Lotus Notes |
| Primary Software Developer: | IBM |
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The NS4 file extension is a Lotus Notes 4 Database file developed originally by IBM for IBM Lotus Notes. Internal website statistics show that NS4 files are most popular with users in United States and those running the Windows 10 operating system. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | IBM Lotus Notes by IBM |
 | IBM Domino by IBM |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .SPP | Serif | Raster Image Files | Serif PhotoPlus Picture File |
| .PHD | CyberLink | Data Files | PhotoDirector Project File |
| .SGT | IBM | Settings Files | SPSS Chart Template File |
| .WK4 | IBM | Data Files | Lotus Lotus 1-2-3 V4 Worksheet |
| .CNT | Microsoft Corporation | System Files | Help Contents File |
| .OB | Innoshock | Uncommon Files | Orbit Downloader Incomplete Download |
| .AS4 | askSam Systems | Backup Files | AskSam Backup File |
| .MDL | MathWorks | Data Files | MathWorks Simulink Model |
| .I3I | IBM | Uncommon Files | IBM Voice Type Languages New User File |
| .SMI | Apple | Disk Image Files | Self-Mounting Disk Image |
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