You can export components from your course offering to a file. This allows you to reuse these components in another learning management system, including another D2L Learning Environment, or to store the components and then re-import them into another course offering or template at a later date.
Components are exported to an IMSCP-compliant zip file, a standard file format based on the IMS Content Packaging specification, meaning you should be able to reuse these components in any learning management system that supports this format.