One way to ensure this common understanding is by publishing a document describing the proper use of the language. In order to communicate accurately in any written language, the writer and the reader must share the same understanding of the symbols and structure of that language. Geometric Dimensioning and Tolerancing, or GD&T for short, is a language of symbols used to communicate information on technical drawings. This article provides an in-depth look at of the contents, history, and purpose of the standard. ASME Y14.5 is an established, widely used GD&T standard containing all the necessary information for a comprehensive GD&T system.