İngiliz Tartı Sistemi

Also known as avoirdupois system, avdp

thumb|upright=1.2|Finely crafted pan balance or scales with boxed set of standardized gram weights sequenced in units of mass.Avoirdupois (; abbreviated avdp.) is a measurement system of weights that uses pounds and ounces as units. It was first commonly used in the 13th century AD and was updated in 1959.