The last names of the two men who manafactured the candies, Forrest Mars Sr. and R. Bruce Murrie.
No.
yes
M&M's
M. monsieur (singular) is abbreviated: m. (no 'r') messieurs (plural) is abbreviated: mm.
m&m yum!
"M&M's" are owned by Mars, Incorporated.
m & m, mars bar, milky way
M refers to the modulus of the slope.
YES
no
more appealing to the eye
M means medium width, as opposed to wide (abbreviated "W") or narrow (abbreviated "B").