Hi Dave!
In a simple way
Clipper is a computer programming language/compiler for DOS,
for x-base programming.
I think foxpro took the "code language part" (sorry
but I'm not a English language native speaker) from it.
I was a user of Clipper. The reason that I'm
using vfoxpro now is because the migration from
Clipper to vfoxpro is easy: same code structure,
functions, database management (at basic level).
Then Microsoft started improving foxpro and turned it
in what we use now.
Any corrections will be appreciated.
Hope this helped.

>>I still have Clipper (DOS) app, which I run from the command windows.
>I don't know what happened, when I run the app today, it didn't give any respond (go back to C:\). then I tried all the DOS app I know, such as old Norton Utility, PKzip, etc, same thing, no respond and nothing happened.
>
>
>I imagine you're running this application from Windows and inside a DOS window.
>What version of WIndows is running?
>What did this Clipper application do when it worked properly?