Real world company prefixes

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M n O P Q R S T U V W X Y Z Ø
M& M- M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ
M&B M&K M&L M&M M&N M&P M&R M&S M&U M&W
1 M&U Middletown & Unionville R.R. 8/1920-7/1936; 1/1941-1/1946   NAKINA
2 M&U MIDDLETOWN & UNIONVILLE RAILROAD     PWRC