I would like to thank the IFS for their generosity in funding part of my conference costs, and Graham Stark for his invaluable help in preparing the presentation. In addition, thanks are due to those Rexx experts, Rony Flatscher in particular, who have helped me with queries I've sent over the newsgroups, and to Mike Cowlishaw, Kurt Märker and Christian Michel from IBM for answering my questions and investigating some of the problems I've had. Finally, I want to add, in the revised post-conference version of this paper, a vote of thanks to the organisers for making the 1997 Rexx Symposium an interesting and greatly enjoyed occasion, and to the other delegates for just being very nice people.