Microsoft MS-DOS 5.0a
Released 11/11/1991 by Microsoft
For IBM PC compatible computers

MS-DOS 5.0a is a minor update to DOS that fixes a data corruption 
issue with specially sized hard drives. This fix was also available 
as downloadable supplemental update PD0646.

Archive includes three 3.5" 720k floppy disk images. 

SHA1:791e291a16a7ce3b3ffb536b1c27dfe8e620338e / Disk 1
SHA2:0e1f4f63d68d02b5224a69e73ee9b7a3e630a1bb / Disk 2
SHA2:1e16f02628a5e13ce2e4a13d1cbff8dd445e3baa / Disk 3