1. How MP3 Music Files Work
What is MP3
The feature of MP3
About the MP3 player
The factor by which MP3 spread
Reference

2. What is MP3
 MP3 is an abbreviated designation of "MPEG-1 Audio
Layer 3".
 It is a common audio format for consumer audio stor-
age, as well as a de facto standard of digital audio
compression for the transfer and playback of music on
digital audio players.
Hi-tech MP3 shoes

3. The feature of MP3
 Disassembly becomes easy for the data which I com-
pressed from decrease of the size.
 It is easy to transfer on telecommunication line.
 It is used with Internet radio widely.
 There can be the thing used for unjust distribution of
the musical piece that a copyright holder does not ac-
cept a redistribution.

4. About the MP3 player
 It is a thing corre-
sponding to the MP3
from a portable music
player.
 The player who had a
large-capacity HDD
built-in can record
music more than
10,000 pieces.
 The MP3 CD can play
a CD Player or the
DVD player of the
support model.

5. The factor by which MP3 spread
 Because free encoder decoder software is available.
 German Fraunhofer - Gesellschaft company and
French Thomson company are insisting on posses-
sion of a license after 1998.
 But because a free encoder of LAME and free revival
software of Windows Media Player were available. It
spread wasn't disturbed.

6. Reference
 isofter
 http://www.isofter.com/glossary.htm
 Wikipedia
 http://ja.wikipedia.org/wiki/MP3