The IBM SELECTRIC Composer: Justification Mechanism

This paper describes the development and design history of the SELECTRIC Composer justification mechanism. The authors present a brief definition of justification and how it relates to the printing industry; the requirements imposed upon a justification device that are peculiar to the SELECTRIC Composer; a description of the justification mechanism and its design, development and testing; and a final evaluation of the design relative to the attainment of its designated objectives, both as a mechanism and as a component of the SELECTRIC Composer.