Assembling characters into formatted text for the purpose of producing print originals. Before typesetting machines were invented, text was set by hand using individual letters of type. The first major changeover in the typesetting world came in 1882 when Ottmar Mergenthaler patented the Linotype line composing machine. In the second half of the 20th Century, typesetting moved increasingly towards photocomposition. Today, typesetting and page make-up are largely computerized in the form of Desktop Publishing.