The Electronic Staff Record system provides a human resources system for the National Health Service of the UK .
In addition to numerous clinical software systems and finance and procurement services , McKesson also is responsible for developing the Electronic Staff Record system for Britain 's National Health Service which , upon completion in 2007 , will provide an integrated pay and human resources system for NHS 's 1.2 million staff , making it the world ’ s largest single HR/payroll IT system .
McKesson Corporation