Input (grade 13): Burrhus Frederic Skinner (March 20, 1904 & ndash; August 18, 1990) was an American psychologist, author, inventor, social philosopher, Smith LD; Woodward WR (/O1996/O).
Output (grade 12): Burrhus Frederic Skinner (March 20, 1904 - August 18 1990) was an important American psychologist and author.