Data in this release are from the Occupational Requirements Survey (ORS), conducted by the U.S. Department of Labor, Bureau of Labor Statistics (BLS). The ORS gathers job- related information regarding physical demands, environmental conditions, mental and cognitive demands, and vocational preparation requirements. This release contains 2016 estimates on occupational requirements for jobs within the U.S. economy for all civilian workers. Excluded are the federal government, the military, agricultural workers, private household workers, and the self-employed. Additional estimates by occupational group and industry are available through the public database query tools at www.bls.gov/ors/#data. Sample size The 2016 estimates are from a single sample of data collected from an establishment based survey using a national sample design. The BLS is building the survey and combining data over three sample years. The full ORS sample, using the three sample years, is expected to reach approximately XX,XXX establishments. Data for the 2016 reference period were collected from a national probability sample of X,XXX private industry and state and local government establishments. The ORS estimates represent XXX,XXX civilian workers in the United States. Measures of reliability To assist users in ascertaining the reliability of ORS estimates, standard errors are made available shortly after publication of the news release. Standard errors provide users a measure of the precision of an estimate to ensure that it is within an acceptable range for their intended purpose. The standard errors are calculated from collected and imputed data, the BLS is researching methods for estimating the variance excluding imputed values. For further information see: www.bls.gov/ncs/ors/orse.htm. Occupational Classification The occupational classification system used by the BLS is the Standard Occupational Classification (SOC) system (www.bls.gov/soc). The ORS classifies occupations by eight- digit codes used by O*NET’s detailed occupational taxonomy referred to as “O*NET-SOC 2010 Occupations”. There are 840 six-digit SOCs and 1,110 eight-digit SOCs, although military specific occupations (55-0000.00) are out of scope for the ORS. Definitions of Major Terms For definitions of major terms used in the ORS, please see the glossary beginning on page 108 of the ORS Collections Manual. Additionally, explanation of the ORS methodology can be found in the ORS Handbook of Methods www.bls.gov/opub/hom/ors. Obtaining Information For research papers on the ORS and testing activities please see information listed at www.bls.gov/ors.