You can have one or more addressbooks in Pine. In addition to a
    personal addressbook, one or more global, read-only addressbooks
    can be set up (for sharing between multiple users). The names
    of your personal addressbooks are specified in the Pine resource
    file by the ADDRESS-BOOK option. Normally, this option is set
    and modified from within Pine by using the SETUP menu and then
    selecting the Addressbook menu; it can, however, also be set by
    manually editing the Pine resource file. The built-in default
    file name used for an addressbook PMDF_INIT:PINE.ADDRESSBOOK.
    A "lookup" file is used to speed access to the addressbook. The
    lookup file has the same name as the addressbook, with -LU as
    suffix; e.g., PMDF_INIT:PINE.ADDRESSBOOK-LU. The lookup file
    is generated automatically by Pine. Global addressbooks can be
    specified using the GLOBAL-ADDRESS-BOOK option.