Given that I didn't use earlier IBM PCs for business, I never quite got into the "lost" tech of that area, dBase. I tinkered around a bit with Visual Fox Pro, but coming mainly from a programming/UI building perspective, checking to see what one could learn there (it was quite good, if I remember correctly).
But no real experience with the non-relational database queries and scripts of that time. Is it worth getting into, just to widen one's horizon? (Probably via DOSEMU and dbase III or IV)















