11.   Dr. Ray Clough, a retired structural engineering professor from the University of California at Berkeley, who designs earthquake-proof structures.

12.   For retired professors like Marie Callahan, the classes offer a chance to prevent the atrophying of teaching skills.

13.   Gilbert Geis is a retired professor of social ecology at the University of California-Irvine.

14.   Haas was a retired professor of medicine at New York University and its Rusk Institute of Rehabilitation Medicine.

15.   I knew the man I was talking to was a retired Oxford professor.

16.   Kennedy, a retired professor of psychology at Loyola University in Chicago, said Egan was a model of the church leader the Vatican now prefers as its bishops.

17.   John Hope Franklin, a historian and retired professor at Duke University.

18.   Kilt maker Lou Torfason, a retired engineering professor who lives in San Antonio, said his orders are on the increase.

19.   Joseph M. Belth, a retired insurance professor from Indiana University who publishes a newsletter on insurance ratings, said prospective customers should gauge their own risk tolerance.

20.   Last year, al-Mihdhar and al-Hamzi rented rooms from a retired professor in suburban San Diego, The Los Angeles Times reported Saturday.