Characters per line

The ruler on the carriage of an Olivetti Lettera 22. This typewriter can print only 87 characters in a line
Typometer with the characters per line scales
A Fortran coding form (paper). Source code has 72 CPL, but a form is 80-characters wide. Last 8 positions are "identification sequence"

In typography and computing, characters per line (CPL) or terminal width refers to the maximal number of monospaced characters that may appear on a single line. It is similar to line length in typesetting.

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