According to Jim Gray, the UNDO mechanism of InterLisp (from Xerox) inspired the transaction system of System-R (one of the first relational databases). http

According to Jim Gray, the UNDO mechanism of InterLisp (from Xerox) inspired the transaction system of System-R (one of the first relational databases). http://books.google.com/books?id=S_yHERPRZScC&pg=PA575&lpg=PA573&sig=7EmWsFQLnXbUMoDPvQEqGVpxw7M http://books.google.com/books?id=S_yHERPRZScC&pg=PA575&#... I think he's talking about InterLisp-D in that section. Anyone know if earlier versions had the same kind of UNDO?