WordBook for Word for Windows 2.x (and successfully converts for 6.x)

WordBook is a simple, direct address and phone book and phone dialer
written written to work directly inside of Word for Windows 2.x.  It
allows you to pop-up the phone and address list at any point in a
document and select the entry to insert information from.  Simply open
WBookU.DOC with Word and follow the instructions inside.  Has a
"trial-run" option and an automatic installation routine!  Once
installed, the program is available from your Tools|WordBook menu and as
Ctrl-Shift-A for a keyboard shortcut.  Quite inexpensive registration
provides license for up to 10 computers (owned and operated by the
person registering the program).  Registration provides for multiple
address books, versatile sorting of address book entries, and generation
of merge print data file from selected address book fields.  Uploaded by
the author!
