orders over the phone and reimburse some customers for losses.

Outages last Friday on brokerage Web sites run by TD Waterhouse Group and Discover Brokerage added to the growing pains for the rapidly expanding industry. Computer problems at Automatic Data Processing Inc., which routes orders from the brokerages to exchanges, prevented Waterhouse and Discover customers from placing orders for at least 90 minutes. An official at Automatic Data did not return phone calls seeking comment.

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