Using Filename Extensions
Mac OS X and other operating systems can use file extensions when determining
which application to open a file with, or what method of transfer to use for a network
transfer. If you intend to transfer your media or project files to non-Macintosh
computer platforms, you should use standard file extensions for your files. Some
common file extensions include .mov (QuickTime movie file), .xml (XML file), .zip
(ZIP compressed archive file), .aif (AIFF audio file), .wav (WAVE audio file), .psd
(Photoshop graphics file), .jpg (JPEG graphics file), and .tif (TIFF graphics file).