The normal way to get to the address book is to press A
for address book from Pine's main menu. You may, however, browse
the address book by pressing the to-address book <Ctrl>T combination
with the cursor in the To:, Cc: or Bcc:
fields of a message you are composing. In this situation, the only
commands available are those which help you select an entry for
the particular message. You cannot add to or modify the address
book in this mode.