One thing has not changed, however: for more than 50 years, the OOH has been respected as the job seeker's number one source of critical decision-making information. From aerospace engineer to water treatment plant operator, the latest edition spans more than 250 occupations, encompassing nearly 90 percent of the jobs in the U.S. economy. The most current source of government statistics on jobs and job opportunities, the Occupational Outlook Handbook organizes a vast amount of data.

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