>>It helps if I think of stacks as very flexible databases... > >I think it does; yes, RAM-based databases. Or as disk-based, client/server databases a la SDB. -- Rob Cozens CCW, Serendipity Software Company "And I, which was two fooles, do so grow three; Who are a little wise, the best fooles bee." from "The Triple Foole" by John Donne (1572-1631)