From AudioLexic
	    
				    				    
	    End of a file name starting with a dot "." then 3 or more letters, telling the kind of file it is.
Example:  a file "doggie.WAV" is an audio file in WAV format
[edit] Audio file extensions
[edit] Usual file extensions
[edit] Video file extensions
| Extension | Type | 
| .AVI | Windows Standard | 
| .MPG | MPEG compressed | 
| .MOV | QuickTime Format | 
| .WMP | Window Media Player, Windows standard | 
[edit] Other file extensions
| Extension | Type | 
| .HTML | HTML document file (HyperText Markup Language) | 
| .PDF | Portable Document File | 
| .TXT | Text |