What is the difference between .prc and .m4r?
- Extension
 - .prc
 - .m4r
 
- Format
 - Binary
 - Binary
 
- Category
 - 3D
 - Audio
 
- Developer
 - Adobe Systems
 - Apple Inc.
 
- Description
 - File created in the Product Representation Compact (PRC) format, which is used to represent 3D models and assemblies; contains product structure, geometry, and product manufacturing information (PMI); stores data in a highly compressed format.
 - M4R is an iTunes ringtone file that stores mono channel audio. They are identical to the M4A format files only that they are correctly used for ringtones.
 
- MIME Type
 - application/x-prc
 - audio/x-m4r
 
- Sample
 - sample.prc
 
- Wikipedia
 - .prc on Wikipedia
 - .m4r on Wikipedia