Office for Intellectual Freedom director Krug began her library career in 1962 when she began working as a reference librarian at the John Crerar Library in Chicago. In 1963, she became a cataloguer for the Northwestern University Dental School. She became a research analyst for the American Library Association in 1965, and in 1967 she became director of its Office for Intellectual Freedom (OIF) upon its foundation. Krug described the role of the OIF as protection of the right of individuals in the U.S. to have comprehensive availability of information, regardless of those who disapprove of the material itself. As director of the OIF, Krug organized publication of a newsletter which recounted instances of censorship in the U.S. and suggested ways to deal with these attempts to limit free speech. She supervised publication of the Intellectual Freedom Manual, the Newsletter on Intellectual Freedom, and the events of Banned Books Week. Krug also helped lead the Intellectual Freedom Round Table, the Committee on Professional Ethics, the Freedom to Read Foundation, and the Intellectual Freedom Committee. In 1969, Krug became the first head of the Freedom to Read Foundation, a sister organization to the OIF. The Freedom to Read Foundation was formed to uphold the First Amendment to the United States Constitution and assist with legal defense. In her capacity as director of the OIF, Krug worked to start Banned Books Week in 1982. She coordinated opposition to the Communications Decency Act of 1996, which was the first attempt by the United States Congress to introduce a form of censorship of speech on the Internet. Opposition to library censorship Krug strongly opposed the notion that libraries ought to censor the material that they provide to patrons. She supported laws and policies protecting the confidentiality of library use records. When the United States Department of Justice used the authority of the USA PATRIOT Act of 2001 to conduct searches of once-confidential library databases, Krug raised a public outcry against this government action. When shortly after the September 11 attacks a Florida librarian told police that one of the attackers had been using the Delray Beach public libraryalthough Florida law guarantees confidentiality to library patronsKrug criticized the action. She stated she wished the librarian had adhered to Florida law, but empathized with the situation and said that most individuals would likely have done the same thing. In 2003, Krug led the challenge to the