Occupational Outlook Handbook - The Bureau of Labor Statistics issues this handbook for career information on a large variety of occupations, broken down by job duties, education and training, pay, and outlook.
O*Net Online- A project from the U.S. Department of Labor/Employment and Training Administration (USDOL/ETA), the O*Net is a free, continuously updated database with standardized, occupation-specific descriptors for hundreds of occupations.