I will be glad to provide this. I can also do GC for databases and persistent object systems. -- Marc Shapiro M. Shapiro, INRIA Rocquencourt, BP 105, 78153 Le Chesnay Cedex, France. Tel.: +33 (1) 39-63-53-25. Fax: +33 (1) 39-63-53-30. e-mail: marc.shapiro@inria.fr. http://www-sor.inria.fr/SOR/