Return to Taipan (thing)
This game now exists for the Palm OS. Still highly addictive, though it still suffers from the problem whereby you might face heaps of enemy ships and not have a button that says "attack until they die, god-****-it!" together with a "turbo" button for those long combat sequences.
Memories of the original Apple II game rests far back in the recesses of my temporal lobe but as I recall, the Palm game had general as the last commodity you could trade and also fixed the bug where you could pay the Elder brother Wu (the moneylender) more than you owed him and thereby collect a ridiculous amount of compound interest.