Operating System Concepts 7th Edition
Abraham Silberschatz & Peter B. Galvin & Greg Gagne
Operating System Concepts (3)
PostgreSQL: Up and Running
Regina O. Obe & Leo S. Hsu
Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
Intellectual Property and Open Source
van Lindberg
Beginning Java With WebSphere
Robert W. Janson