The American Institute of Chemical Engineers (AIChE) was founded in 1908. In a brief period of about one century that has passed since then, chemical engineering has gained recognition as a field of engineering. The proliferation of chemical engineering today is entirely due to the great efforts of our ancestors during these years. Today, the scope of chemical engineering has expanded to cover an extremely wide range and it is no exaggeration to say that chemical engineering deals with almost all phenomena concerned with materials and that the subject of chemical engineering will cover an increasingly larger area in the future.