Take a look at the article on thermite at https://en.wikipedia.org/wiki/Thermite. Google thermite. Here is how to make it http://how2dostuff.blogspot.com/2006/01/how-to-make-thermite.html.

Why thermite? If you place a properly built container of thermite inside your computer, above and around your hard drive, and you run a magnesium strip through it, and you connect the magnesium strip to a vibration controller that ignites the magnesium strip if your computer is moved, ZAPPO, no more hard drive. But be careful. Do your due diligence and use your head. It could mean no more computer desk, no more floor, no more house, and no more son or daughter who moved the computer.

You get the idea. A properly controlled thermite reaction will reduce lots of stuff to their component molecules, and even atoms.