All of this is pre-internet stuff and I am not aware of any archives in existence today that contain what was on Delphi in the 1980s.
This is literally a piece of computer science history. Certainly worth saving. Hopefully these files will be properly archived.
I know MS-DOS, because I grew up with it. But not in the 1980s, but in the 1990s. I was born on 1992.09.17, so probably I was not on this planet yet in 1985. Except if I had a previous life. Who knows.
By the way, I noticed something weird on the MS-DOS screenshots in the post. There are files with the year 2107. The floppy disk you used is probably belongs to a time traveler. Haha.
!LOLZ.