This page is part of the web mail archives of SRFI 44 from before July 7th, 2015. The new archives for SRFI 44 contain all messages, not just those from before July 7th, 2015.
This is mostly for the history interested. I think all operations are in the current proposal. <http://zurich.ai.mit.edu/pipermail/rrrs-authors/1992-September/001462.html> -- Jens Axel Søgaard