OpenDoc is a new software
technology that lets you add software components called
"parts" to your documents. When you drag a part into a
document, the part is added to the document--along with any
tools or menu commands associated with that part. For
example, when you add a graphic part to a document, tools
and commands for editing graphics become available to
you.

With OpenDoc, you can create a document
that combines different types of data -- including text,
graphics, sound, and video--and edit each type of data
within the document. You don't have to switch back and forth
between application programs.
You can also mix and match your favorite
software features. For example, you can use your favorite
text editor, your favorite drawing tools, and your favorite
spell-checker all within the same document.
OpenDoc is a new approach to computing
that lets you focus on the things you create (documents)
rather than the tools you use to create them
(applications).
You can create documents
entirely out of parts, or you can add parts to OpenDoc-aware
application programs. Cyberdog, installed with the Mac OS,
is an OpenDoc-aware application that includes parts you can
use to access the Internet.