DOSBox is a freely available, cross-platform PC emulator. Rather than attempting to be the technology leader as a business-orientated virtualization environment like VMware or Qemu, DOSBox instead offers a rich set of features aimed at closely recreating the behaviour of a retro gaming PC. To this end, it offers a selection of accurate sound card emulations and facilities to throttle the emulation speed back to vintage PC levels, along with other features designed to make sure that the old games run properly and accurately within a protected environment.