Retired SIGs
- Atomic - The AtomicSIG aims to build, deliver and maintain an Atomic Host for CentOS Linux. And help bootstrap tooling around the effort.
- Cloud Instance - Look into issues around running CentOS Linux Instances in various private and public clouds
- Xen4CentOS - A Xen 4 (4.4, 4.6, 4.8) implementation for CentOS Linux 6 and CentOS Linux 7. Later absorbed into the Virtualization SIG
- PaaS - Platform as a Service on CentOS