2MB is an alias belonging to U1-Asami, who composes some of the many music tracks played on the Dance Dance Revolution video game. Songs with the 2MB artist label are remixed versions of their original counterparts.
Nickname of Myung-bak Lee, 17th president of South Korea. His last name Lee has the same phonetic as the number 2, hence 2MB. It is often used to show that he doesn't have enough capacity (2 mega bytes) to sustain in the modernized Korea.
2MB's brain capacity is 2MB while the every citizen has at least few Giga bytes.