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The Associated Press

WINSTON-SALEM, N.C. — Computer maker (Nasdaq: DELL) has postponed the closing date for a North Carolina manufacturing plant a fourth time, now pushing the target date into next year.

Dell spokesman David Frink said Friday the Texas-based company has seen improved demand for personal computers and will keep production humming in Winston-Salem until early January.

The plant has 400 employees and a number of contract workers Frink wouldn’t disclose.

The company announced last October it would close the plant within three months, eliminating 900 workers.

The massive computer assembly plant was offered more than $300 million in incentives to choose the North Carolina site in 2004. Most state incentives were never paid, and Dell repaid local governments $26 million in upfront incentives.