1. Container Interface
https://systemd.io/CONTAINER_INTERFACE
2. Discoverable Partitions Specification
https://systemd.io/DISCOVERABLE_PARTITIONS
3. OCI Runtime Specification
https://github.com/opencontainers/runtime-spec/blob/master/spec.md
4. OSTree
https://ostree.readthedocs.io/en/latest/
5. overlayfs.txt
https://www.kernel.org/doc/Documentation/filesystems/overlayfs.txt
6. Fedora
https://getfedora.org
7. Debian
https://www.debian.org
8. Ubuntu
https://www.ubuntu.com
9. Tanglu
https://www.tanglu.org
10. Arch Linux
https://www.archlinux.org
11. OpenSUSE Tumbleweed
https://software.opensuse.org/distributions/tumbleweed