IBM DOS 4.0x

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IBM DOS 4.00

RTM

• 4.00 (1988-06-17)

IBM DOS 4.01

RTM

• 4.01 (1988-08-03) (English)

RTM (CSD)

• 4.01 (1989-05-10) (CSD UR25066) (English)
• 4.01 (1990-03-20) (CSD UR29015) (English)
• 4.01 (1990-06-29) (CSD UR31300) (English)

IBM DOS 4.05

RTM

• J4.05/V (Japanese) [PS/55]

IBM DOS 4.06

RTM

• J4.06/V (Japanese) [PS/55]

IBM DOS 4.07

RTM

• J4.07/V (Japanese)