MS Dos 3.31

[fs5500]

A few of user may think that must be retail package of MS-DOS 5.0

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/rSMAAOSwiCRUa~O1/$_57.JPG

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/E6YAAOSw2XFUa~O5/$_57.JPG

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/~-IAAOSwg3FUa~O9/$_57.JPG

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/73cAAOSwQJhUa~PD/$_57.JPG

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/puAAAOSwj0NUa~PM/$_57.JPG

But it is Not Retail package but OEM package.

MS didn't release Full version of MS-DOS 5.x - 6.x as Retail package.
(Released Upgrade version of it as Retail package.)

From version 1.x - 4.x, no Upgrade version exist but Full version only.

 

[Stone]

MS-DOS 4.0x was Not available as Retail Package.

But IBM DOS 4 was. I've got a boxed set.

 

[fs5500]

I've also have IBM 4.00 (5.25").

I don't know IBM DOS 4.0x was released as Retail Package on Retail Market. (At least MS-DOS 4.0x was Not.)
As you know IBM DOS 4.0x is for IBM machine only. (No support for Non IBM PC vendor.)

 

[Caluser2000]

I've got IBM Dos 4.01 in the 3.5" package. IIRC it did install fine on one of my clones well over a decade ago though despite what the booklet says. It also specifically states it can't be used on a PCjr.