MPEG Audio Layer 3 (MP3): This format was developed by Motion Picture Expert Group to allow compression of audio and video for digital distribution. The MP3 format is a popular format that is used to store digital audio files. This is because MP3 files are generally smaller than WAV files. Windows Media Audio (WMA): This format was developed by Microsoft and is used to store digital audio files. Digital audio also allows streaming of digital audio files. With audio streaming, you do not have to wait to completely download a large audio file from the Internet to play it. Instead, you can use a streaming audio player or a browser add-in to play the audio file from the Internet. In this case, the audio file is sent to your computer in a continuous stream.