Euric asked in USMA 27518

In a recent posting between myself and Han of the Netherlands, we
discussed the use of dpi in computer printers. Being a computer science
genius, maybe you could answer a simple question.


I made the assumption that the use of dpi is not part of a printers
hardware, but of its software.  Either through its drivers or the word
programmes.  Could you tell us, if this is actually true or not?

If it is all software, then how easy would it be to change the use of
dpi to micrometer pitch?

Euric


I suspect that "dots per inch" is the result of the fact that the inch is the smallest unit in the inch/pound system. Another example of this is "miles per gallon". In most of the world automobile fuel consumption is expressed as "litres per 100 kilometres" (I would prefer "L/Mm"). The fuel consumption of other devices from lawn mowers to railway locomotives is usually expressed as "gallons per mile" or "gallons per hour" in inch-pound countries. This follows the convention that the result of an action is put in the numerator and the cause is put in the denominator.



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