In looking for ways to get our Listserv 1.8d installation to use less memory, I saw in the go.user file that one can set DBRINDEX=0 to disable reverse indexing. I run Listserv under a Tru64 Unix environment where the default is "DBRINDEX=1" in go.user. I reading through the documentation on LSoft's Web site, the system admin guide for 1.8d refers to the release notes for 1.8c for a "discussion" on reverse indexing. I search both sets of release notes, but I couldn't find anything about reverse indexing and what the consequences are of turning it off. Can someone please explain to me what reverse indexing is and what the consequences are if I disable it?