The manual has: >3.3. Defining search categories in a list header for the CataList >================================================================= > >Note: The complete list of search categories may not yet be available >when LISTSERV 1.8c is released. Note also that during the "pilot" phase >of categories implementation, all categories will be "open", and you can >define search categories for your list as long as the categories you >define are in compliance with the rules for defining categories. When the >"production" phase begins, only categories defined below as "open" will >be open, and if a list is created or modified without a "Categories=" >keyword, LISTSERV will issue a warning (but will go ahead and store the >list without it). It then goes on to explain how to add a sub-category. But as far as I can tell *none* of the categories are open (based on a GET LISTCAT FILE), and no sub-categories can be added, and much of this section is irrelevant. Am I missing something? Don.