21.   Supporters say the old bankruptcy system let too many debtors off the hook.

22.   The air-independent propulsion systems let submarines stay underwater for weeks, bringing their performance closer to that of nuclear submarines.

23.   The computer reservation systems let travel agents check schedules and book tickets.

24.   The computerized system would let citizens monitor the flow of money and help deter the widespread corporate cheating that now takes place under cover of poor record-keeping.

25.   The floating band exchange system would let the bolivar depreciate by setting maximum and minimum exchange rates, the newspaper said.

26.   The free-market system let the United States ship its goods, open its factories and move capital anywhere it wanted.

27.   The lesson learned, she maintains, is what happens when the justice system lets someone repeatedly escape punishment.

28.   The new system lets the seat come down slowly and keeps it from bouncing, even during turbulence.

29.   The public housing system also let lapse the screening procedures that once insured that new tenants would be responsible neighbors.

30.   The olfactory system lets them perceive the myriad of other flavors.