The laser here was pulled from a DVD player, if I remember right.
It is aimed by an older PC, using NVIDIA's CUDA technology, which turns the GPU you're using to get lots of frames of 3D acceleration in your FPS games into a gob of massively parallel processors. This technology is being looked at for places where mosquitoes contribute to the problem with Malaria.
We're solving Malaria by blasting insects out of the sky with lasers aimed by video-game technology. We live in the future.