Originally developed to run on the ATARI ST computer, Cubase (previously known as Cubeat and Cubit) is one of the top DAW programs in the world today. It handles multi-track midi sequencing and audio with advanced editing capabilities and VST hosting. In 2003, Pinnacle Systems purchased Cubase and later sold it to Yamaha Corporation in 2004. Within two years, Steinberg made the decision to discontinue support for their proprietary .ALL and .ARR file formats, and changed the format to .CPR. It is no longer possible to open .ALL and .ARR files in modern versions of Cubase.