The 5 distinct aims for institutional repositories are:

I. (RES) self-archiving institutional research output ? (preprints, postprints and theses)

II. (MAN) digital collection management (all kinds of digital content)

III. (PRES) digital preservation (all kinds of digital content)

IV. (TEACH) online teaching materials

V. (EPUB) electronic publication (journals and books)

Steven Harnad