Template (file format) - Wikipedia

Different Font File Types Explained (OTF, TTF, WOFF)

Common file name extensions in Windows - Microsoft Support

What are File Extensions and why are they important?

Common Image File Extensions Explained

Supported File Types, Assignments, Assessments

windows 7 - Use File TypesMan to change extension setting, but it show this file type may affect the following extensions - Stack Overflow

40 File type / File extension icon

Font Extensions

Understanding File Type Extensions in Silhouette Studio - Caught by Design

How-To Configure Windows 7 to Show File Extensions