Most of the dictionary entries and style guide recommendations regarding the term "acronym" through the twentieth century did not explicitly acknowledge or support the expansive sense. The Merriam–Webster's Dictionary of English Usage from 1994 is one of the earliest publications to advocate for the expansive sense, and all the major dictionary editions that include a sense of "acronym" equating it with "initialism" were first published in the twenty-first century. The trend among dictionary editors appears to be towards including a sense defining "acronym" as "initialism": The "Merriam-Webster Collegiate Dictionary" added such a sense in its eleventh edition in 2003, and both the "Oxford English Dictionary" and the "American Heritage Dictionary" added such senses in their 2011 editions. The 1989 edition of the "Oxford English Dictionary" only included the exclusive sense for "acronym" and its earliest citation was from 1943. In early December 2010, Duke University researcher Stephen Goranson published a citation for "acronym" to the American Dialect Society e-mail discussion list which refers to "PGN" being pronounced "pee-gee-enn," antedating English language usage of the word to 1940. Linguist Ben Zimmer then mentioned this citation in his December 16, 2010 "On Language" column about acronyms in The New York Times Magazine. By 2011, the publication of the third edition of the "Oxford English Dictionary" added the expansive sense to its entry for "acronym" and included the 1940 citation. As the "Oxford English Dictionary" structures the senses in order of chronological development, it now gives the "initialism" sense first.