"Terra is Cerner's open-source framework for creating web applications integrating into the Cerner application ecosystem. Built on a foundation of React, Terra provides the building blocks to construct single-page applications. More than just a component library, Terra offers solutions to common application problems such as internationalization, modal presentation, unsaved changes, loading overlays, and themes.
Terra also offers a reusable set of configurable React components to help build out applications. Similar to Apple's AppKit, these React components are designed to be building blocks that are composed into higher-order workflows and components to represent your concepts."