The final program for the sixth international workshop on Foundations of Object-Oriented Languages (FOOL 6) is available on-line at http://www.cs.williams.edu/~kim/FOOL/FOOL6.html. Information on registration is also available there. The advance registration deadline is December 23. The workshop is co-located with POPL '99 and will be held on Saturday, January 23, 1999, in San Antonio, Texas. Kim Bruce