The use of letters in exchange names resulted in the placement of letters on the telephone dial, even outside the areas using the letter and number combinations. Some Canadian areas at first used original letter schemes, notably Calgary, Alberta, until later standardization within North America. Québec exchange names differed from those on standard Bell System lists due to the need for names in the French language; Hull, Quebec's 77x (PR as in PRovince) needed to be recognizable in both languages in 1957.