R&D personnel
R&D personnel of a statistical unit includes all persons directly engaged in R&D, i.e., employees of the statistical unit, external staff fully integrated into the R&D activities of the statistical unit, as well as persons providing direct services for the R&D activities (such as R&D managers, administrative staff, technical specialists, and office staff). R&D personnel can be divided into three categories: researchers, technical personnel, and other personnel.