How to install 145 operating systems on one PC

3 versions of DOS, 5 versions of Windows, and 137 flavors of Linux on 152 partitions. He created on 4 hard drives to get his system up and running. He probably has the longest GRUB menu you’ve ever seen. We’re guessing the slowest part of the boot process on this system is the amount of time it takes to find the operating system you want to use.