try "Operating System: A design-objected approach" by Crowly. it deals with concepts of object-oriented design operating systems Jim ----- Original Message ----- From: "Sune Kirkeby" <sune@interspace.dk> To: "Tobias Hunger" <tobias@berlin-consortium.org> Cc: <debian-hurd@lists.debian.org> Sent: Tuesday, July 18, 2000 4:01 AM Subject: Re: Recommended Reading?