Qubes OS 3.0 Release Candidate 1 (RC1) comes with a number of new features, such as the implementation of the brand-new hypervisor-abstracted architecture, which is also known as HAL, the addition of Xen 4.4, and new qrexec. Additionally, several new virtual machine templates have been integrated in Qubes OS 3.0 RC1, supporting well-known Linux kernel-based operating systems like Debian 8.0 (Jessie), Debian 7.0 (Wheezy), Whonix 9, and many others.