Point (typography)  

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In typography, a point is the smallest whole unit of measure, being a subdivision of the larger pica. It is commonly abbreviated as pt. The point has long been the usual unit for measuring font size and leading and other minute items on a printed page.

The original printer's point, from the era of foundry metal typesetting and letterpress printing, varied between 0.18 and 0.4 mm. The defined length of a point varied over time and location until the late 1980s and early 1990s, when the traditional point was supplanted by the desktop publishing point (also called the PostScript point), which was defined as Template:Frac of an inch. In either system, there are 12 points to the pica.

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