An operating system process that handles HTTP interaction with a Zope database (ZODB). In other words, the Zope web server process. Alternatively, the Python code and other configuration files necessary for running this process.
One Zope installation can support multiple instances. Use the buildout recipe plone.recipe.zope2instance to create new Zope instances in a buildout environment.
Several Zope instances may serve data from a single Data.fs using a ZEO server on the back-end.