Extreme memory footprint: A tiny bootable C++17 hello world is currently 900 KB and needs only 5 MB RAM on x86_64. KVM, VirtualBox and VMWare support with full virtualization, using x86 hardware virtualization, available on most modern x86 CPUs. IncludeOS will run on any x86 hardware platform, even on a physical x86 computer, given appropriate drivers. Officially, we develop for- and test on Linux