W3C Web Content Accessibility Guidelines (WCAG) 2.0 ...

For example, Windows 3.x not only operated on top of MS-DOS, but also was a good citizen as an MS-DOS application, even using device drivers loaded within MS-DOS. Windows 95, and Windows NT, while they broke with 3.1’s model of running from MS-DOS, often still used the inferior FAT or FAT32 file systems, part of the legacy of MS-DOS. ................
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