Systeme international d'unites (s.i. units).

The metric system is now used in most countries for expressing measurements in the health care field. The original metric system based on lenght (centimetre), mass (gramme) and time (second) has proved inadequate. The International Bureau of Weights and Measures, which has the ultimate responsibility for standarization of measlring systems, has revised and extended the metric system, through a series of general conferences on weights and measures, to the systeme International d'Unites (S.I.). This is now the internationally accepted language for measurements throughout science and industry.