These units of density are not yet supported by the CLDR:
dots per inch (dpi)
dots per centimeter (dpcm)
pixels per inch (ppi)
pixels per centimeter (ppcm)
These units are commonly used in publishing, photography, and digital display devices. The abbreviations for these units do change depending on language. For example, '''dots per inch''' is '''dpi''' in many languages but '''ppp''' in Spanish, Catalan, Portuguese, Italian, and French.