The state today selected a Rhode Island corporation to supply a new computer system for the state lottery. The system is projected to cost about $61 million over five years.

GTECH Corp.'s winning bid was more than $20 million below the only other bidder, Control Data Corp., a New Jersey company that now runs the lottery system.

Two separate committees appointed by Gov. William Donald Schaefer both recommended GTECH. Charles Benton Jr., state budget secretary, said he would recommend GTECH to the state Board of Public Works for final approval within the next few weeks.

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