: It significantly improved support for different languages through COUNTRY.SYS and the ability to switch "code pages" for keyboards and displays. Inside the Reference Manual
: For the first time, users could divide a single hard drive into multiple "logical" drives (D:, E:, etc.), allowing for better organization and bypassing some earlier storage limits. MicrosoftВ® MS-DOSВ® 3.3 Reference - TEXTFILES.COM
: It was the first version to support the high-density 3.5-inch disks that became the universal standard until the rise of CDs. : It significantly improved support for different languages