81.   A closely watched price index fell below a critical level, setting off computer programs to sell huge blocks of shares.

82.   A delay could set off a chain reaction of delayed products and lower-than-expected earnings in the technology industries.

83.   A commitment to the World Trade Organization will set off a new round of social and political changes, experts here say.

84.   A board committee earlier this month refused to approve the lease, setting off a flurry of discussions between the airline and the city.

85.   A Celtic win will set off spin doctors and headline writers.

86.   A moderate earthquake thumped the San Francisco Bay Area early Friday, halting commuter trains and setting off dozens of burglar alarms.

87.   A move by Germany to start shaving interest rates would be a political gift to leaders straining to cut spending without setting off social unrest in most European countries.

88.   A person within a given range can also hit a panic button, which will set off the house alarm.

89.   A report from a captured rebel of deaths of four hostages set off a search south of Srinagar the following year, but no bodies were found.

90.   A small explosive charge sets off the generators one after the other, to inflate the bag in stages and to keep it inflated longer.