The university became involved in the print trade around 1480, and grew into a major printer of Bibles, prayer books, and scholarly works. OUP took on the project that became the "Oxford English Dictionary" in the late 19th century, and expanded to meet the ever-rising costs of the work. As a result, the last hundred years has seen Oxford publish further English and bilingual dictionaries, children's books, school textbooks, music, journals, the World's Classics series, and a range of English language teaching texts. Moves into international markets led to OUP opening its own offices outside the United Kingdom, beginning with New York City in 1896. With the advent of computer technology and increasingly harsh trading conditions, the Press's printing house at Oxford was closed in 1989, and its former paper mill at Wolvercote was demolished in 2004. By contracting out its printing and binding operations, the modern OUP publishes some 6,000 new titles around the world each year.