DPI
Dots Per Inch — a measure of print resolution indicating how many ink dots fit in one linear inch of printed output.
DPI is primarily relevant for printing. Standard print quality requires 300 DPI at the target print size. A 3000×2000 pixel image printed at 300 DPI produces a 10×6.67 inch print. Lower DPI results in visible pixelation. For screens, the equivalent measure is PPI (pixels per inch). When scanning photos, higher DPI captures more detail from the original print.