What stands for "MOS" by Mos Burger?

It is not such a meaning as moss, it seems to be an abbreviation.

MOUNTAIN (山)

OCEAN (sea)

SUN (Sun)
MOS BURGER [Company / IR information: company information (MOS and / top message)]
http://www.mos.co.jp/company/outline/message/

MOS has the meaning of MOUNTAIN (majestically noble and dignified like a mountain), OCEAN (with a deep broad mind like the sea), SUN (with a passion that does not burn out like the sun).

It is said that the founder thought, but it is quite a meaningful meaning.