Nice Stuff
Hardware
www.laercio.com.br
http://www.gabrieltorres.com
Linux
http://www.linux.org
http://www.linuxbrasil.org
http://www.linuxjournal.com
http://www.redhat.com
http://www.samag.com
Linux Device Drivers
Linux Kernel Hackers Guide
Linux System Calls
http://www.kernel.org
ftp://tsx-11.mit.edu/pub/linux
http://www.linuxbase.org
http://www.li.org
http://www.portalcon.com.br
Operating Systems
http://www.cs.vu.nl/~ast
http://WilliamStallings.com
ReactOS (Windows NT clone)
Operating System Resource Center
Special Interest Group on Operating Systems
Leslie Lamport Publications and Articles
Java
Threads, Synchronized Blocks -
Legal Notice
Antigravity
Antigravity
On-line courses
http://www.techonline.com