If you have a modern Intel CPU (released in the last few years) with Intel’s Management Engine built in, you’ve got another complete operating system running that you might not have had any clue was in there: MINIX. That’s right. MINIX. The Unix-like OS originally developed by Andrew Tanenbaum as an educational tool — to demonstrate operating system programming — is built into every new Intel CPU. The first thing that jumps out at me here: This means MINIX (specifically a version of MINIX 3) is in all likelihood the most popular OS shipping today on modern Intel-based computers (desktops, laptops and servers). That, right there, is absolutely crazy. The second thing to make my head explode: You have zero access to “Ring -3” / MINIX. But MINIX has total and complete access to the entirety of your computer. All of it.