Which dictionary company's 1961 advertising campaign featuring the slogan "We have the words" revolutionized dictionary marketing by positioning their product as an essential tool for social mobility?

In the world of language reference materials, marketing innovations have sometimes revolutionized how dictionaries are positioned and sold. One particular marketing campaign in dictionary history stands out for changing public perception of reference books from purely academic tools to must-have household items. This campaign brilliantly leveraged linguistic authority while creating strong brand identity. How well do you know this landmark in linguistic product marketing?

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Merriam-Webster with their "America's Language Authority" campaign
Oxford University Press with their "The Definitive Record of the English Language" campaign
Random House with their "The Dictionary Preferred by America's Leading Writers" campaign
Webster's New World Dictionary with their "The Dictionary for the Space Age" campaign