This document defines and provides examples of abbreviations, contractions, and jargon. It states that an abbreviation is a shortened form of a word or phrase using letters from the original, while a contraction omits letters and combines the remaining parts. Abbreviations are widely used for measurements in cooking and baking as well as educational degrees and job titles. Internet chat abbreviations are also included. The document concludes by giving examples of medical, police, and political jargon, which are specialized terms used within specific professions or groups.