Document Management System on shared Apache host

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Does anyone have any experience or a recommendation for a content
management system -- preferably a document management system -- that I
can install on shared hosting on an Apache server (to which, as a
shared server, I do not have root access)?

I'm looking at KnowledgeTree open source but I think this requires a
greater degree of access than inexpensive hosting allows.

Thanks in advance for any suggestions.

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