Rate calculator

A typesetting calculator is the computer ( computer ) of an electronic typesetting machine that automatically calculates the line length, the line exclusion , the word separation at the end of the line and the page break. In the case of corrections, the entire paragraph no longer has to be re-set in photo typesetting (in contrast to metal type ) if a word is inserted in a line. The sentence calculator determines the optimal number of letters for the following lines and calculates the new exclusion.

With the appropriate control software , multi-purpose computers can also be used as sentence calculators. The Troff program , for example, was originally written to control a large number of different typesetting machines.

In the course of the 1990s, however, desktop publishing completely supplanted computer-assisted photo typesetting; the former functionality of the typesetting calculator is now an integral part of the visual layout program, which runs on a standard personal computer .