I am most grateful to Thorsten Ohl, who provided me with
pre-release versions of VAMP and O'Mega and had many valuable
suggestions and criticisms during the development of WHIZARD.
I would also like to thank R. Chierici, K. Desch, N. Meyer and
S. Rosati, who used preliminary versions of the program for real-life
applications and thus helped a lot in debugging and improving the
code.