To maintain such a chapter is an endless task :-).
HP became recently concious of the importance taken by Linux and free software in general, and on its machines particularly. Thus a web site dedicated to Linux in HP environment is now available at http://www.hp.com/go/linux.
In France, there is for a longer time a site on these themes, under the responsability of Jacques Misselis <Jacques_Misselis@hp.com>, hosted by l'École Centrale de Lyon at the address http://hpwww.ec-lyon.fr/hpeduc/education.
On the other side, the firm Medasys for which I worked between 1996 and 2000, put at disposition of the community a certain number of information since 1997, available at http://www.medasys.fr/linux. This HOWTO is the result of this work.
HP also realised a synthesis document (PDF format) concerning his position in front of Linux, the White Paper HP Linux Strategy (1999-04).
HP also communicates through its web site around Linux and free software. You'll find some links here.
FireHunter announce (10/06/1998)
Covision program announce (01/27/1999)
Linux support on NetServers and IA-64 announce (01/27/1999)
PA-Risc port announce (03/01/1999)
Informix HP association announce (03/02/1999)
Kayak Linux support (03/17/1999)
World Linux support announce (04/20/1999)
HP OpenView announces (05/17/1999)
Availability of Apache on HP 3000 (Summer/1999)
Visualize Linux support announce (06/21/1999)
Open Source Software commitment by HP (08/09/1999)
Aberdeen group analysis on HP position on free software (08/09/1999)
HP Linux vision (01/01/2000)
HP announces the certification of its DAT and DLT products under Linux (02/02/2000)
HP Brings Award-winning 3-D VISUALIZE Graphics to Linux Desktop (02/02/2000)
HP and Intel Release IA-64 Developer's Kit for Linux (06/13/2000)
HP Announces Linux Support for State-of-the-art 3-D Graphics Accelerators (07/25/2000)
HP Expands Commitment to Linux (08/14/2000)
HP adds Linux support for its Chai appliance platform Software (09/26/2000)
HP NetServers make Linux Hum for Solid State Design
Medasys chosen by Hewlett-Packard France Education/Research as Linux competence center
Hewlett-Packard France Education/Research announces commitment to Linux promotion
HP's open letter to the Open source Community (10/18/2000)
HP Ultrium Tape Drives Certified to be Linux Compatible (11/21/2000)
Bruce Perens, Open Source advocate, joins HP (12/04/2000)
OSDL opens today with 19 sponsors including HP (01/24/2001)
HP Extends Linux Support for Enterprise Solutions (01/31/2001)
HP's commitment for Linux during Linux-Expo Paris 2001 (02/02/2001)
HP opens print driver source code (04/04/2001)
EMEA announces around Linux (Trusted Linux, Mandrake Certification, ...) (08/2/2001)
B. Maillard Interview (HP France) (08/24/2001)
HP Expands Open Source Offerings with Linux Security Software and Embedded Software Platform for Intelligent Devices (08/27/2001)
HP Builds Supercomputer from Off-the-Shelf Parts (Oct. 2001)
HP's Linux stratégy
HP, Red Hat Provide Selected Universities Worldwide with Grants of Red Hat Linux Software
I've participated to a conference organised by Cyperus during the Linux-Expo Paris 2001. You could see it at this address rtsp://discovery.oleane.net:554/2001/janvier/linuxexpo/linux207.rm
HP France has also published an article on Linux and free software in its May 1999 issue of HP Computer News, an article on HP Linux support in the September 1999 issue, and an article on Linux RedHat solutions on HP Visualize workstation in the November 1999 issue.