| File Extension: | CNX |
| File Type Description: | IBM Rational XDE Data |
| File Type Developer: | IBM |
| Primary Associated Software: | Rational XDE |
| Primary Software Developer: | IBM |
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The CNX file extension is a IBM Rational XDE Data file developed originally by David Harris for Pegasus Mail. Commonly, IBM Rational XDE Data files are found on user computers from United States, and on PCs running the Windows 10 operating system. Google Chrome is their primary internet browser for the bulk of these users.
 | Pegasus Mail by David Harris |
 | Rational XDE by IBM |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Linux |
 | Unix |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .SDT | Intuit, Inc. | Data Files | QuickBooks Data File |
| .ENX | IBM | Data Files | IBM Rational XDE Data |
| .SSX | IBM | Data Files | IBM Rational XDE Data |
| .19 | IBM | Data Files | IBM Voice Type Languages Scripts Data File |
| .EAR | Oracle Corporation | Executable Files | Java Enterprise Archive File |
| .WG1 | IBM | Spreadsheet Files | Lotus 1-2-3 Worksheet File |
| .LBR | Dag Agren, Circlesoft | Compressed Files | LU Library Archive |
| .PPX | Serif | Page Layout Files | Serif PagePlus Template File |
| .UIL | IBM | Data Files | AIX User Interface Language |
| .AIO | IBM | Developer Files | APL Transfer Format File |
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