Our microdata tools are a service provided by the German Microdata Lab (GML). These are brief reports which give information on the practical use of microdata in various subject areas and are complemented by tabulations, graphs, and SPSS/Stata jobs, including, among others, the construction of various social science classification systems (e.g. CASMIN-Classification) for microcensus data. Furthermore, the concepts underlying data from official sources are explained (e.g. labour force concept).