The Human Resources and education in Science and Technology (HRST) domain provides data on stocks and flows (where flows in turn are divided into job-to-job mobility and education inflows ). The data also provide information on persons with tertiary education in the fields of Science, Technology, Engineering and Mathematics (STEM) in the labour market.

Stocks and flows are the main statistics for HRST. Their methodologies interlink and are therefore presented together in one single metadata-file. This metadata-file is duplicated in the structure of Eurostat's online database, while statistics for stocks and flows are found in separate folders. Several breakdowns are available for stocks and flows indicators: sex, age, region, sector of economic activity, occupation, educational attainment, fields of education, although not all combinations are possible. Breakdowns for STEM data are provided by sex, age (15–34, 35–54, 55–74, 20–64 and 15–74), labour status, sector of economic activity and occupation, across STEM fields of study.

The data on stocks, job-to-job mobility and STEM are obtained from the European Union Labour Force Survey (EU LFS). The National Statistical Institutes are responsible for conducting the surveys and forwarding the results to Eurostat.

The data on education inflows are obtained from Eurostat's Education database and in turn obtained via the UNESCO/OECD/Eurostat questionnaire on education.