David Parnas

David Parnas
Born	(1941-02-10) February 10, 1941 (age 83) Plattsburgh, New York, United States
Known for	Information hiding, Strategic Defense Initiative activism
Scientific career
Doctoral advisor	Alan Perlis Everard Mott Williams
Doctoral students	Richard J. Lipton Steven M. Bellovin

David Lorge Parnas (born February 10, 1941) is a Canadian early pioneer of software engineering, who developed the concept of information hiding in modular programming, which is an important element of object-oriented programming today. He is also noted for his advocacy of precise documentation.