Phototypesetting systems first appeared in the early 1960s. These devices consisted of glass disks that spun in front of a light source to selectively expose characters onto light-sensitive paper. The typesetter then typed a line of text on a
Fairchild keyboard. To verify correct content of the line it was typed a second time. If the two lines were identical a
bell rang and the machine produced a punched paper tape corresponding to the text. This was used to create a mechanical
drawing or paste up of a whole page. A large film negative of the page is shot and used to make plates for offset
All this changed after the first pre-engineered system appeared. This symstem combined every step in one box, including
all editing processes up to the exposure to light. This software also contained a hyphenation-programm. A keyboard was
used to type the text into the system and a small display showed the written text and its formatting.
After a few years and better-developed computers, it was finally possible to view the entire print image on a screen.