I found this in the archives, maybe it will help you narrow the search..


>Date: Wed, 7 Aug 1996 14:58:25 -0400
>From: johnholt@... (John Holt)
>Subject: Accounting database
>
<snip>

>1. ZTree, an indexed database, as created by David Hearne and modified by
>T.J. Smith and Ray Arachelian. A certain lack of information on the
>database. Obvious overkill for my current application but possibly the way
>to go when the monthly bookkeeping portion kicks in so that speed is
>retained?