diff --git a/operating_systems/live-migration-of-virtual-machines.pdf b/operating_systems/live-migration-of-virtual-machines.pdf new file mode 100644 index 0000000..4f2116f Binary files /dev/null and b/operating_systems/live-migration-of-virtual-machines.pdf differ diff --git a/operating_systems/xen-and-the-art-of-virtualization.pdf b/operating_systems/xen-and-the-art-of-virtualization.pdf new file mode 100644 index 0000000..088ca93 Binary files /dev/null and b/operating_systems/xen-and-the-art-of-virtualization.pdf differ