Hewlett Packard
http://fr.wikipedia.org/wiki/HP-48
http://www.hp-network.com/interviews/interview4/interview4.php
http://www.guzu.net/hp48/
http://memo5.dyndns.org/Manuels/Ordinateurs/HP/Editions%20Courbis/lisezmoi.txt
http://m.webring.com/hub?sid=&ring=hp48
http://mailgate.dada.net/comp/comp.sys.hp48/msg39782.html
http://www.tutorials-be.com/hp48/Quality-paintjob-186120/
http://del.icio.us/jerome/hp48
http://www.adictoshp.org/modules/newbb/viewtopic.php?post_id=14046
http://encyclopedie-enligne.com/h/hp/hp-48.html
http://collection.sasfepu.free.fr/collection/hp28.htm
http://collection.sasfepu.free.fr/collection/hp48.htm
http://www.ganjatron.net/retrocomputing/hp-28s/index.html