| File Extension: | CH1 |
| File Type Description: | IBM Freelance Graphics Chart File |
| File Type Developer: | IBM |
| Primary Associated Software: | Lotus Freelance Graphics |
| Primary Software Developer: | IBM |
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Release of the Lotus Freelance Graphics software program prompted the development of the IBM Freelance Graphics Chart File file type by IBM. Our internal web tracking data indicates that Windows 10 operating system users, and those living in United States, are the most likely to use IBM Freelance Graphics Chart File files. Google Chrome is their primary internet browser for the bulk of these users.
 | Lotus Freelance Graphics by IBM |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .STT | Microsoft Corporation | GIS Files | Streets & Trips Map Template |
| .TR1 | IBM | Uncommon Files | IBM Voice Type Languages Addword File |
| .PKX | IBM | Data Files | Rational XDE Data |
| .I3I | IBM | Uncommon Files | IBM Voice Type Languages New User File |
| .WK! | IBM | Spreadsheet Files | Lotus 1-2-3 Spreadsheet |
| .1DK | IBM | Backup Files | OS/2 Saved SKF Format |
| .SMX | MakeMusic, Inc. | Data Files | SmartMusic XML File |
| .NTS | IBM | Settings Files | Lotus Notes Traveler Server Config File |
| .IIB | IBM | 3D Image Files | IBM Lotus Notes Data |
| .POR | IBM | Data Files | SPSS Portable File |
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