Many thanks to Graeme McKinstry for providing a set of files that formed the basis of PS-LAEMTEMEXEEMX. The NFSS implementation is based on that by Mittelbach and Schöpf, and some of the font-loading code is based on a version by Sebastian Rahtz.
Thanks are also due to those who have been patient testers (Michael Fisher, Graham Gough, David Carlisle and Bill Mitchell), to all those who reported bugs (Nick North, Alasdair Rawsthorne, Ralf Kneuper, John Fitzgerald, Jon Warbrick, Robert Brown, Graham Carter, Andrew Barnard and Michael Fisher) and to Leslie Lamport for useful suggestions.