SI units

The gram or gramme, symbol g, is a unit of mass. It is defined as one one-thousandth of the SI base unit kilogram (i.e., 1×10−3 kg). Its name derives from the Greek/Latin root grámma. ...more on Wikipedia about "Gram"

DIN, the German standards body, has devised a standard way of specifying font dimensions in metric units using two values: font size (Schriftgröße) and font height (Oberhöhe). The latter is the height of a full-height letter, such as H, and the former is, by default, 72% of it (rounded) for well-proportioned, one-line leading. Font dimensions are specified in two numbers separated by a solidus: SG/OH, both in millimetres. For example, a text in about 12pt size and with default, one-line leading is defined as 4.3/6.0 according to the standard. The same size with extra leading, for one and a half lines of space, is defined as 4.3/9.0. Text in about 14pt size and default leading is 5.0/7.0. ...more on Wikipedia about "Metric typographic units"

The International System of Units (abbreviated SI from the French language name Système International d'Unités) is the modern form of the metric system. It is the world's most widely used system of units, both in everyday commerce and in science. ...more on Wikipedia about "SI"

The SI system of units defines seven SI base units: fundamental physical units defined by an operational definition. ...more on Wikipedia about "SI base unit"

SI derived units are part of the SI system of measurement units and are derived from the seven SI base units. ...more on Wikipedia about "SI derived unit"

The Tachymeter scale is a scale commonly printed on sports analog wristwatches to quickly convert the time it takes something to happen into a rate, or the number of events of that type that will take place in a given time period. ...more on Wikipedia about "Tachymeter scale"