The origins of the IEEE Code of Ethics can be traced back to 1906 when the president of AIEE gave an address that led to the creation of a "Code of Principles of Professional Conduct," adopted in 1912. Following the 1963 merger of AIEE and IRE, a new code of ethics for IEEE was adopted in 1974 and revised in 1979 and 1987. In 1990 a shorter code was adopted, with content and wording more appropriate for a worldwide membership. In 2006 the word, engineering, was deleted in one sentence. Related activities in other organizations are discussed in an addendum.