Among distinguished sociologists, Harold Garfinkel was a Professor Emeritus at the University of California. Harold Garfinkel established and developed ethnomethodology as a field of inquiry in sociology. According to Harold Garfinkel "The demonstrably rational properties of indexical expressions and indexical actions are an ongoing achievement of the organized activities of everyday life"- Studies in Ethnomethodology (Prentice-Hall, 1967). Harold Garfinkel analysed the methods used by people in everyday life to describe and make sense of their own activities.
Harold Garfinkell substituted phenomenon for principle, signaling a different approach to sociological inquiry. Seeing Sociologically and Toward a Sociological Theory of Information was written while Garfinkel was a student.