ThisvolumecontainstheproceedingsofATC2009, the6thInternationalConf- ence on Autonomic and Trusted Computing: Bringing Safe, Self-x and Organic Computing Systems into Reality. The conference was held in Brisbane, A- tralia, during July 7-9, 2009. The conference was technically co-sponsored by the IEEE and the IEEE Computer Society Technical Committee on Scalable Computing. ATC 2009 was accompanied by three workshops on a variety of research challenges within the area of autonomic and trusted computing. ATC 2009 is a successor of the First International Workshop on Trusted and Autonomic...