FileInfo.com - The File Extensions Resource

.PCM File Extension

File Type	Pulse Code Modulation
File Format	File
Common?	No
File Description	Uncompressed (raw) digital audio file; a direct representation of the digital sample values (1s and 0s) of an audio recording; also used in .WAV and .AIF files
Program(s) that open pcm files	Mac: Apple QuickTime Player Windows: Apple QuickTime Player; Cool Edit Pro; Adobe Audition

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/pcm