PRC
The Palm Resource Compiler (PRC) format is sometimes considered to be an e-book format because a number of electronic readable documents have this extension, but it's not really a specific format of that type; it's merely a variant of the PalmOS Database format (used on Palm devices) which uses .prc as its extension instead of the more common .pdb to designate a resource for Palm devices. An e-book is one of the sorts of resource which may be stored this way, and some e-book readers use it. The format is basically the same as MOBI, but with a different extension; however, as a PRC file it is limited to the syntax used on Palm devices, without the extensions that were added to the MOBI format for other devices with more functions.
No connection with the People's Republic of China, though.
