you can recover the data into something like Access. Access Im pretty certain has an import filter that will import dBase
but if you have lost the disks you are going to be struggling to recover the application. But dBaseII, that was the first dBase dating back to what, 1987?.....
you may be able to get another flavour of dBase or possibly something like xBase, or even foxpro which may allow you to recover the app. although whether its worth it I dunno
you may get a better answer in the 'other PC' databases forum