Though trading on-line during last week's market turmoil had its glitches, the existence of the Internet meant that investors had more stock price information than in 1987, when those phoning brokers could not get through.

San Francisco-based E-Trade Group and Charles Schwab & Co., Boston-based Fidelity Investments, and New York-based Quick and Reilly all reported that their Web-based trading systems continued to work throughout Monday and Tuesday. However, some acknowledged there were delays in getting trades completed due to the sheer number of users.

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