a system of related measures that facilitates the quantification of some particular characteristic | a system of evaluation based on awarding points according to rules |
a decimal unit of measurement of the metric system (based on meters and kilograms and seconds) | a system of writing or printing using patterns of raised dots that can be read by touch |
a function of a topological space that gives, for any two points in the space, a value equal to the distance between them | a system of graduating sizes of type in multiples of the point |