a self-contained unit
"An educational object is an interchangable, complete, and self-contained unit that is designed to be used in various settings and in various ways. Such an object can be quite large (an entire cours, for example) or quite small (for example, a single simulation or data set). Large objects can be built up from smaller ones."
- Wattenberg, Frank (1998) "A National Digital Library for Science, Mathematics, Engineering and Technology Education." D-Lib Magazine, October 1998. ISSN 1082-9873
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