What's new in PHP V5.3, Part 1

What's new in PHP V5.3, Part 1: Changes to the object interface
http://www.ibm.com/developerworks/opensource/library/os-php-5.3new1/index.html

devfs - installation and configuration

Advanced filesystem implementor's guide, Part 5
http://www-106.ibm.com/developerworks/library/l-fs5.html

http://www-106.ibm.com/developerworks/library/l-fs6.html (broken link)

A roadmap for developers making the transition to Linux

http://www-106.ibm.com/developerworks/linux/library/l-roadmap.html