| File Extension: | RI |
| File Type Description: | IBM Lotus 1-2-3 File |
| File Type Developer: | IBM |
| Primary Associated Software: | Lotus 1-2-3 |
| Primary Software Developer: | IBM |
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IBM developed the IBM Lotus 1-2-3 File file type when the Lotus 1-2-3 was initially released. Website visitor analysis indicates that RI files are commonly found on Windows 10 user machines, and are most popular in United States. A majority of people seeking info on RI files are using the Google Chrome browser.
 | Lotus 1-2-3 by IBM |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .WG2 | IBM | Data Files | IBM Lotus 1-2-3 File |
| .UCX | IBM | Data Files | Rational XDE Data |
| .WJ3 | IBM | Spreadsheet Files | Lotus 1-2-3 Worksheet File |
| .AIO | IBM | Developer Files | APL Transfer Format File |
| .PHD | CyberLink | Data Files | PhotoDirector Project File |
| .IMP | Lotus Software | Spreadsheet Files | Improv Spreadsheet File |
| .BLO | IBM | Data Files | IBM DB2 Binary Large Object Data |
| .STI | Oracle Corporation | Data Files | StarOffice Presentation Template |
| .P2C | IBM | Data Files | IBM Voice Type Languages Newuser File |
| .DGX | IBM | Data Files | IBM Rational XDE Diagram |
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