PRC, Mobipocket eBook File (.prc)
The PRC eBook file format
The PRC file format is an eBook format created by Mobipocket and used exclusively for Palm devices that support PRC or PDB extensions. PRC files can also be viewed on PC using the Mobipocket Reader Desktop. Unprotected PRC files can also be viewed on the Amazon Kindle reading device. The PRC file extension is similar to the MOBI extension.
Technical details of PRC files