ISO 3:1973
Preferred numbers; Series of preferred numbers

Standard No.

ISO 3:1973

Release Date

1973

Published By

International Organization for Standardization (ISO)

Latest

ISO 3:1973

Scope

Preferred numbers are the conventionally rounded of term values of geometrical series, including the integral powers of 10 and having as ratios special factors in accordance with the specified tables. Basic, expectional, R 80 and derived series are designated.

ISO 3:1973 history

• 1973 ISO 3:1973 Preferred numbers; Series of preferred numbers