Mike after Leonard: >> Where can I read up on the TurboImage implementation of >> B-Trees? > There is an article about in the 5.5 express 3 communicator > on page 4-11 as well as the current Image manual of August 1997. Pages 123 through 146 of the 5.5 PowerPatch 5 Communicator are also devoted to new and "recently new" features in QUERY and TurboIMAGE. Lot's of good stuff. I will second (again) Mike's plug for the August '97 version of the TurboIMAGE manual. If you use IMAGE, you need to get this latest version; it was a major manual upgrade that was well done... Ken Sletten SIGIMAGE Chair