Computers have become a vital part of everyday life, from communicating with family members to keeping abreast of current affairs and design work. Many computer users choose a Macbook over a PC for their superior performance.
M4V files you purchased or rented from Apple Store are DRM protected. You are restricted to play the DRM m4v files on ONLY 5 of Apple devices. If you want to play M4V files on PS3, you have to PS3 the DRM protection of M4V files and convert M4V to PS3 videos.
Out of the 250 million people in the United States, about 25 million of them play an instrument of some kind, or used to when they were in school and would like to pick up where they left off. Another 30 million or so sing in a church choir, a barbershop quartet, or at the very least, in the shower.