Purple box M
Milka, took me a while to get this one too.
The logo is aTm. But the "a" and "m" are capital but smaller then the "T".
It is a logo for motor sports.
Maybach's logo includes the green and yellow M's.
Movistar's logo is a green M with subtle yellow highlights.
Big m
I believe you are referring to the retro Seattle Mariners symbol. http://www.typesett.com/wp-content/uploads/2009/05/seattle-logo-1.gif
Big m
minute maid
The "M" logo for McDonalds probably stands for "McDonalds"
McDonald's logo is called the golden arches