The growth of mathematics in the twentieth century is astonishing. While many of us experienced math as a study of numbers, today's student must have a broader grasp of the ways in which math supports the fabric of our lives.
In 1900, math could be classified into about twelve distinct subjects that could fit into 80 books. During the twentieth century (especially after World War II), math exploded into expanded areas of traditional study as well as into many new areas of study. Today, the 60 or 70 subjects would fill about 100,000 volumes!