WOLTERS KLUWER nv
Box 818
1000 AV Amsterdam THE NETHERLANDS
September 29, 1998
Ovid Technologies, Inc.
333 Seventh Avenue
New York, New York 10001
In connection with and pursuant to your entering into the Agreement and
Plan of Merger dated as of September 29, 1998 with OTI Acquisition Corp. and
Wolters Kluwer U.S. Corporation, we hereby unconditionally guarantee the payment
obligations of OTI Acquisition Corp. and Wolters Kluwer U.S. Corporation under
that Agreement.
Sincerely,
WOLTERS KLUWER nv
By: /s/ PETER W. VAN WEL
--------------------------
Peter W. van Wel
Member, Executive Board
Agreed and Accepted:
OVID TECHNOLOGIES, INC.
By: /s/ MARK L. NELSON
-----------------------
Name: Mark L. Nelson
Its: President