What is the Meaning of MP4

Although commonly most of the people uses the term MP4 to refer to those portable players of image and video, which so fashionable in recent times, replacing the traditional walkman and that any teenager and those who are not so also, because there, usually carry when traveling by bus, bus, or any other form of public transport that you can think of them to liven up and entertain their way clear, in fact, the term in question corresponds to its real owner, which is the encoding format of audio and associated video that was popularized by the company Apple who generalized the use of the word being the designation of the extension of the files, m4a in its iTunes software and popular audio players Ipod to distinguish between audio and video mpeg-4 files. Bah, in fact, were the manufacturers of these portable players that took over the term MP4 as an advantage for marketers to sell their products since the term MP4, decidedly, produces the majority of the people a feeling and a belief of superiority of this connection of the mp3, as a matter of basic number, that of course the 4 is more than the 3.
While most of the m4a files were created using the formed AAC (Advance Audio Coding) and this talk or would tell us that no other file created under other different parameters could be content in the, really and contrary to this belief, m4a files can contain for example files in other formats such as mp3 or Apple lossless.
There are two types of players of digital storage according to the storage mode, the player based on flash, which is the one that stores digital audio files on internal and external memory such as a memory card but who have one lesser capacity storage with respect to other players that are based on a hard drive allowing you to store these last from 5 GB to 200 GB, 512 MB - 8 GB previous ones against.