Two golden arches in the shape of an 'M'.
The "M" logo for McDonalds probably stands for "McDonalds"
McDonalds
It can be a matter of opinion but it stands out and instantly recognisable!
Probally
McDonalds
Because it is the first letter of "McDonalds"because mcdonalds begins with an "M"
Mcdonalds & red bull Xpedx's logo is another example. Look at BP's logo.
probably mcdonalds
Most brands have their letters in their logo, just not all of them, like DC, or Aeropostle, or GAP.
A type-based logo has only text in it. Xerox or Yamaha is an example. A mark based logo has a symbol associated with it. Nike and McDonalds are examples.
The Golden Arches logo first appeared in 1962 however the first McDonalds opened in with that name opened in 1940.
I'm pretty sure it is McDonalds