also tools like Flightshop that made it feasible for users to design new objects. Flight Simulator 5.1 − Released in 1995 In 1995, Flight Simulator 5.1 was introduced, adding the ability to handle scenery libraries including wide use of satellite imagery, faster performance, and a barrage of weather effects: storms, 3D clouds, and fog became true-to-life elements in the Flight Simulator world. This edition was also the first version that was released on CD-ROM and the last for DOS. This was released in June 1995. In the fall of 1995, with the release of the Flight shop program, nearly any aircraft could be built. The French program "Airport" was also available for free which allowed users to build airports (FS5.1 only had 250 Worldwide) and other designers were doing custom aircraft cockpit panels. This all made for a huge amount of "freeware" to be released to be downloaded and added to the FS5.1 simulator. Forums such as CompuServe, Avsim, and Flightsim.com acted as libraries for uploads and discussion. In November 1995, Microsoft acquired the Bruce Artwick Organization (BAO), Ltd from Bruce Artwick. Employees were moved to Redmond, WA, and development of Microsoft Flight Simulator continued. Flight Simulator for Windows 95 − Released in late-1996 With the release of Windows 95, a new version (6.0) was developed for that platform. Although this was essentially just a port from the DOS version (FS5.1), it did feature a vastly improved frame-rate, better haze, and additional aircraft, including the Extra 300 aerobatic aircraft. Instead of using the version number in the title, Microsoft instead called it "Flight Simulator for Windows 95" to advertise the change in operating system. It is often abbreviated as "FS95" or "FSW95". This was the first version released after the purchase of BAO by Microsoft, and after having physically relocated development of the BAO development staff to Microsoft's primary campus in Redmond, Washington. The BAO team was integrated with other non-BAO Microsoft staff, such as project management, testing, and artwork. Additional scenery included major airports outside Europe and the US for the first time. Flight Simulator 98 − Released on September 16, 1997 Flight Simulator 98 (version 6.1), abbreviated as FS98, is generally regarded as a "service release", offering minor improvements, with a few notable exceptions: The simulator now also featured a helicopter (the Bell 206B III JetRanger), as well as a generally improved interface for adding additional aircraft, sceneries,