In the fields of science, engineering, industry and statistics, accuracy's the degree of closeness of a measured or calculated quantity to its actual (true) value. Accuracy's closely related to precision, also called reproducibility or repeatability, the degree to which further measurements or calculations show the same or similar results. The results of calculations or a measurement can be accurate but not precise, precise but not accurate, neither, or both. A measurement system or computatio… (More on Accuracy)