If you are looking for software and documentation for the HP Series 80 computers (early 80s) which include the HP-83, HP-85, HP-86 and HP-87 computers, check out www.series80.org. Thanks to contributions from many people the site now contains tons of useful material: Programs: http://www.series80.org/Programs/index.html Documentation: http://www.series80.org/Manuals/index.html ROM Images: http://www.series80.org/Images/index.html Best Regards **vp