This page provides some of the common systems for storing digital/learning objects.
Institutional Repositories "make the research output of institutions easier to discover as well as manage and preserve. They also make it possible to share information globally..." Library Journal, 2002
The Learning Objects in some repositories contain defined instructional goals and have been evaluated for technical usability. Some objects have also been peer reviewed by experts in the same academic field.
Journals, articles, and texts discussing Learning Object and Institutional Repositories.