The Occupational Information Network (O*NET) purports to be a replacement for the Dictionary of Occupational Titles. The O*NET 98 Data Dictionary was developed under a contract between the US Department of Labor, Employment and Training Administration and Trefoil Corporation, Orono, ME, in cooperation with Aquirre International and the National O*NET Consortium. Version 1.0 has been revealed by this study to be a valid and reliable source of occupational information. It was described as a collection or composite of other occupational information and therefore not descriptive of any specific job. The O*NET 98 development effort attempted to provide a comprehensive database that described occupations, worker skills, knowledge, abilities, and work place requirements for jobs in all sectors of the United States economy. As an automated replacement for the outmoded Dictionary of Occupational Titles (U.S. Department of Labor 1991), it was expected to provide the flexibility needed to capture rapidly changing job requirements into the 21st century.