Anne C. Mosey, PhD, OT, FAOTA (1938–2017), is known worldwide as a significant occupational therapy pioneer in the development and articulation of a cohesive configuration of occupational therapy as a profession, including its philosophical base, theoretical base, and applied knowledge base. In 1970, she proposed the frame of reference as a unique guideline for intervention for occupational therapy. She established the first doctor of philosophy program at New York University and has published several significant books defining the profession’s applied body of knowledge. In her 1985 Slagle Lecture, Mosey argued that the profession must adopt a pluralistic perspective. Her leadership includes member of the AOTA Board of Directors. The Anne Cronin Mosey Lectureship is presented annually by NYU. Read Mosey’s Slagle Lecture.