Private firms increased hiring last month, adding some 216, 000 workers, according to a monthly report from payroll giant Automatic Data Processing.

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After the investigation, Mr. Angelastri sent the report back to his credit-card processing company.

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The Automatic Data Processing (ADP) National Employment report that was released on May 31, 2011, showed that just 38, 000 new private sector, non-farm jobs were added in May.

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The report also notes that new employers are sometimes indifferent to processing rollovers because they must confirm that the money comes from another qualified plan.

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The error was revealed by a radar data processing system before the planes came into contact, said the report.

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In addition, a report on private-sector jobs growth for March compiled by Automatic Data Processing and Moody's Analytics showed an increase of 158, 000 jobs on the month, well below the 192, 000 expected.

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The problems with the processing system are also being investigated by the National Audit Office, which expects to report in the spring.

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The report says engineers can help serve a growing population by improving food output through biotechnology, mechanisation, food processing and irrigation.

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