Stephen Wolfram was born in London and educated at Eton, Oxford and=20 Caltech. He received his Ph.D in theoretical physics in 1979 at the age of= =20 20, and in the early 1980s made a series of discoveries that launched the=20 field of complex systems research. In 1981 he was awarded one of the first= =20 MacArthur 'genius' awards. Starting in 1986 he created Mathematic, the=20 primary software system now used for technical computing worldwide, and the= =20 tool that made A New Kind of Science possible. Wolfram is the founder and=20 CEO of Wolfram Research, the leading technical software company with=20 offices in Illinois and Oxford. He is the author of The Mathematica Book=20 which is now in its fourth edition and has sold over 250,000 copies.