Hi, I managed to get DEC APL V4.0 working and am now looking for the associated layered documentation. It would correspond to OpenVMS Release 5.4/5.5. If anyone knows if DEC did supply layered documentation on CD for these releases at least this would be a start. Alternatively, if someone has access to the paper documentation :) The volumes I'm after are: "VAX APL Reference Manual" "VAX APL User's Guide" "VAX APL Language Summary" Many thanks to everyone who has offered their support and help so far. I can confirm that the product uses downloadable fonts for various terminals such as VT220, these work on my VT520. I'd bet there aren't many terminal emulators that can handle downloadable fonts! Regards, Mark. -- Mark Wickens Rhodium Consulting Ltd