Artisans such as cabinetmakers had long been employed to produce, say, bedsteads, at so much per bed, and printers had been paid so much per pica of type set at least since the eighteenth century.
Pica generalmente se refiere a un tipo de impresión de "10 caracteres por cada pulgada a lo ancho (horizontal) por 6 lineas por pulgada a lo alto (vertical)".