MP3

Từ điển Oxford Advanced Learner 8th

MP3 7 BrE [ˌem piː ˈθriː] NAmE [ˌem piː ˈθriː] noun countable, uncountable
a method of reducing the size of a computer file containing sound, or a file that is reduced in size in this way

Word Origin:
[MP3] 1990s: from ↑MPEG + Audio Layer-3.