.otf
| File Type 1 |
 OpenType Font |
| File Format |
Standard (developed by Microsoft and Adobe Systems) |
| Usage |
Referenced by an application; not meant to be opened manually |
| Popularity |
★ ★ ★ ★ ★ Popular |
| Description |
Font format developed by Adobe and Microsoft; combines aspects of PostScript and TrueType font formats; fully scalable, meaning the font can be resized without losing quality.
The OpenType font format is supported by Mac OS X and Windows 2000 and later.
|
| Open With |
| Windows |
 Microsoft Windows Font Viewer
 FontForge
|
| macOS |
 Apple Font Book
FontForge |
| Unix |
FontForge |
|
| Updated |
August 26, 2010 |
| File Type 2 |
 OpenTuft Tufting Design File |
| File Format |
Standard (developed by NedGraphics) |
| Usage |
Open manually |
| Popularity |
★ ★ ☆ ☆ ☆ Uncommon |
| Description |
General interface format for creating tuft designs that can be processed by tufting machines; allows designs to be weaved into various textile products; contains information such as thread-up, yarn placement, and yarn tuft lengths.
The OTF file format is specified in a Windows .INI file-like structure.
Important: The OTF format is supported by NedGraphics tuft design software, but NedGraphics changed the ".otf" extension to ".otu" since there were conflicts with OpenType font files.
|
| Open With |
| Windows |
 NedGraphics Tuft software
|
|
| Updated |
2007 |
| File Type 3 |
OpenDocument Formula Template |
| File Format |
Proprietary (OASIS) |
| Usage |
Referenced by an application; not meant to be opened manually; may run a program or script when opened |
| Popularity |
★ ★ ☆ ☆ ☆ Uncommon |
| Description |
Template for creating formulas used by OpenOffice spreadsheets; allows cells within the spreadsheet to be automatically filled in based on formula calculations; formatted using the OASIS OpenDocument XML standard.
|
| Open With |
| Windows |
OpenOffice Calc
|
| macOS |
OpenOffice Calc |
| Unix |
OpenOffice Calc |
|
| Updated |
2007 |
|
