Occupational Outlook Handbook (OOH)
http://www.bls.gov/oco/

The Occupational Outlook Handbook (OOH) provides information on nature of work; working conditions; employment; training, advancement, and other qualifications; job outlook; earnings; related occupations; and sources of additional information for over 250 different occupations covering 9 out of 10 jobs in the economy. The Occupational Outlook Handbook is a nationally recognized source of career information, designed to provide valuable assistance to individuals making decisions about their future work lives. The Handbook is revised every two years. Occupations may be searched both in the index or in the table of contents. This has been added to Employment Resources Subject Tracer™ Information Blog.