that Gutenberg invented the move able type used in this kind of printing way back in 1439. Each character must be selected, and setup for the printing run. This box shows how the type was stored -- a box like this was available for each size and font.
Gutenberg was German and his original, alphabetic organization of the type was still used several hundred years later. However, Rick noticed that the J and U were out of place -- they were AFTER the Z. Our guide told us that since there was no J or U in the German alphabet, Gutenberg never included them in the type tray and they had to be added later.