The present report supplements the reports for individual States and for the United States and its several regions and divisions, originally published in the 1960 Census of Population, Series PC(1)-C reports, "General Social and Economic Characteristics," and the Series PC(1)-D reports, "Detailed Characteristics." These reports form two of the four chapters of 1960 Census of Population, Volume I, Characteristics of the Population. Part 1 of Volume I presents data originally published in the four separate United States Summary reports; the remainder of the volume is divided into a part for each State and for the outlying areas, containing data originally published in the separate paper-bound series.

In Volume I, occupational data are presented for the population as a whole, each State, Standard Metropolitan Statistical Area, urban place, and county. Cross-classifications of occupational data are presented in Volume I with Earnings In 1959, Year Last Worked, industry, age, and place of work. The tables in the present report provide greater detail for analytical use at the national level.

Several of the Series PC(2) reports contain data on occupations by various characteristics. The report, PC(2)-7C, Occupation by Industry, contains detailed national statistics cross-classifying occupation by industry for employed persons. The report, PC(2)-7B, Occupation by Earnings and Education, presents national and regional statistics on educational attainment and Earnings In 1959 for males between the ages of 18 and 6V years in selected occupations.
Other related PC(2) reports, either published or in planning, present occupation data, in relation to the subject of the report. Subjects covered in these reports are School Enrollment, educational attainment, journey to work, family characteristics, fertility, mobility, nonwhite population by race, Puerto Ricans, and persons of Spanish surname.

The PC(3)-1A report, State Economic Areas, includes data on major occupation groups for State economic areas by urban and rural residence. The report, PC(3)-1D, Standard Metropolitan Statistical Areas, presents data on selected broad occupation groups in the largest Standard Metropolitan Statistical Areas and in various types of groupings of SMSA's.

Data for 1950 on occupational characteristics similar to those shown here were presented in the report entitled 1950 Census of Population, Volume IV, Special Reports, Part 1, chapter B, Occupational Characteristics. (For a discussion of 1950-1960 comparisons, see section on "Comparability.")

Data on occupations are also collected by the Bureau of the Census in the Current Population Survey (CPS) and published monthly by the Bureau of Labor Statistics, U.S. Department of Labor, in Employment and Earnings. In April 1960, the data for this survey were collected from a sample of approximately 35,000 households in 333 areas throughout the country. In addition, CPS data on major occupation group in cross-classification with such characteristics as marital status, mobility, and income are published by the Census Bureau in Series P-20 and P-60, Current Population Reports. The statistics provided by the Current Population Survey are, in General, designed to be comparable with the decennial census statistics. There are, however, certain elements of difference, as explained in the section on "Comparability."