This is a floppy disk from the 1980's, containing a full operating system (MS-DOS). The capacity of the floppy disk was 360KB. Microsoft Flight Simulator 2020 was released recently. The total download
![MS-DOS Ver 3.21 + supplemental disk / GW-BASIC Ver 3.20 Rev 2.0C : Microsoft Corp. : Free Download, Borrow, and Streaming : Internet Archive MS-DOS Ver 3.21 + supplemental disk / GW-BASIC Ver 3.20 Rev 2.0C : Microsoft Corp. : Free Download, Borrow, and Streaming : Internet Archive](https://archive.org/download/MSDOSV321supgwbasic/1.jpg)
MS-DOS Ver 3.21 + supplemental disk / GW-BASIC Ver 3.20 Rev 2.0C : Microsoft Corp. : Free Download, Borrow, and Streaming : Internet Archive
![MS DOS 6.22 Upgrade Disk 1-3 Microsoft : Microsoft : Free Download, Borrow, and Streaming : Internet Archive MS DOS 6.22 Upgrade Disk 1-3 Microsoft : Microsoft : Free Download, Borrow, and Streaming : Internet Archive](https://archive.org/download/ms-dos-6.22-upgrade-disk-1-3-microsoft/MS-DOS%206.22%20Upgrade%20Disk2%20-%20Microsoft.jpg)