Lotus Components are small, fast, reusable software modules that can be used to combine the capabilities of multiple desktop applications within a single Notes document. This technology makes it possible for end users to drop a lightweight component, such as a spreadsheet, chart, or project scheduler, directly into a Notes document and to work with that component without ever leaving the Notes environment. This article provides a comprehensive introduction to the features and uses of Lotus omponents, detailing how to embed components, how to have components exchange information with Notes, and how to custom-build components that are “Notes-ready”.