 However a 80386 or better microprocessor is recommended for this software with at least 640k of RAM.The PC version came out in several floppy disk media types (5- 5.25" high density disks), compact floppy disks, 4–3.5" high density disks) and CD-ROM versions.One of the technical advisors to the development of the simulation was Major Joseph N. Worsley (USAAF, Retired) one of the top bombardiers in the USAAF trained in the use of the Norden as well as Sperry bombsights on Boeing B-29s.