Technology has changed the way in which authors are able to do business with publishers, whether for traditional paper-based publications or for their own institutional publications. It has also made possible the use of online repositories both for collecting and publishing material in electronic form as well as for providing long-term storage and reference facilities.
 

Some aspects of repositories, both technical and managerial, need careful attention if they are to avoid the dangers of obsolescence and maintain the ability of users to find and refer to the items stored.