This document introduces PrimeNG, an open source library of Angular UI components. It provides over 80 reusable components for common interfaces like dropdowns, dialogs, tables, charts and more. PrimeNG is free to use, has been an open source project for 3 years, and has over 5000 downloads. Examples provided demonstrate how to use various components like dropdowns, dialogs, tables and charts in Angular applications. The document also discusses related libraries, themes, documentation and support options available for PrimeNG.