The clearinghouse could be viewed as a secondary revenue stream. Pro Easy to build and maintain a listserv. Ability to value add the document by bundling with search and hypertext tools. It would be up to the subscriber to maintain the current inventory of documents electronically on their systems, if the inventory was lost, it would be difficult to replace or retrieve. There are several different types of secure servers.
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The idea behind secure servers is that only those people with the right combination of ID and password would be given admittance to the server. These servers could be either Internet based or privately held services. There are several examples of privately held services currently in existence. All of these offer the not only current issues but back issues, all of which is searchable. This model is also now gaining acceptance on the Internet.