While I am waiting for my 100 year old type case cabinet to arrive (yay!), I am arranging one of my typefaces so that I can do some print runs. The California Job Case is a way of organizing type that was made popular by the foundries on the West Coast. The reason it became popular was that previously upper and lower case letters were stored in separate upper and lower drawers or cases, respectively. Putting the upper and lower cases together in the same tray, increased efficiency and saved time. Also, the more frequently used letters were put in easier reach of the typesetter.