A list of useful links
http://www.hp9845.net - Site dedicated to the HP 9845 system, the HPDrive project is very useful also for the HP 260 & 250
http://www.hpmuseum.net - This museum has a lot of informations about HP systems, including the HP 260 & 250
http://www.decadecounter.com/vta/articleview.php?item=429 - Page about the Hybrid Processor that is found on HP 9845, 250 & 260
http://www.bolo.ch - The Bolo museum, located at the Swiss Institute of Technology (EPFL - ETHL) in Lausanne
http://www.hpalumni.org - Hewlett-Packard Alumni
http://commons.wikimedia.org/wiki/File:HP_250_system.jpg - HP 250 picture
http://www.langmeier.ch - My personal website
http://ch.linkedin.com/in/robertlangmeier - My linkedin page