EXHIBIT 10.16
 
TIBCO SOFTWARE INC.
 
Reuters Limited
85 Fleet Street
London
EC4P 4AJ
 
18 December 2002
 
Dear Sirs
 
Reuters/TIBCO Inter-company Agreement
 
We are writing to confirm that we have both agreed to extend until 31 December
2003 the duration of the Addendum effective 2 June 2001 to the First Amended and
Restated License Maintenance and Distribution Agreement dated 28 May 1999
between Reuters Limited and TIBCO Software Inc.
 
Please would you sign and return the enclosed copy of this letter to indicate
your agreement to its contents.
 
Yours sincerely
/s/    VIVEK RANADIVE        

--------------------------------------------------------------------------------

Vivek Ranadive
Chairman & CEO

 
ACCEPTED & AGREED
For and on behalf of Reuters Limited
Signature:
 
/s/    ANDREW GARARD        

--------------------------------------------------------------------------------

   
Andrew Garard