MS or MA: Stands for Masters of Science and Masters of Arts, respectively. These are the traditional degrees given by colleges of arts and sciences in the United States. Generally, a master's degree is not sufficient to be licensed as a psychologist, although some states and Canadian provinces do allow it.
Electrical generation was the sector with the highest productivity growth in the U.S. in the early twentieth century. After the turn of the century large central stations with high pressure boilers and efficient steam turbines replaced reciprocating steam engines and by 1960 it took 0.9 lb coal per kw-hr. Counting the improvements in mining and transportation the total improvement was by a factor greater than 10.
Women, Impact of the Great Depression on. The Great Depression affected women and men in quite different ways. The economy of the period relied heavily on so-called sex-typed work, or work that employers typically assigned to one sex or the other.