Click here to install
OpenDoc is a new plug-in software that lets you extend the usefulness of your applications by easily adding new functionality. OpenDoc uses software components - called parts - that can be dragged and dropped into documents created by any OpenDoc-aware application. You can combine parts from different MAC OS software developers to add tables, graphs, outlines, and even live Internet resources into your documents. Since OpenDoc is a cross-platform technology, documents created with OpenDoc can work across different computer platforms, including MAC OS, Windows, Unix, and OS/2.
Apple
http://opendoc.apple.com