Zygmunt Lech Warsza，born in Wilno Poland (now Vilnius Lithuania) Graduated: at Electrical Faculty of Warsaw Technological University:-  MSc. of El. Eng. 1959,-  PhD in electrical measurements 1967    Work:     1958-63 Institute of Electrotechnics IEl. Assistant 1960-70 TU Warsaw Chair of Electrical Measurements, Assistant Professor.      1970-78 Assoc. Professor at Technology University Kielce-Radom; organiser and Dean of Transport Faculty 1970-76lecturing:  theory of electrical circuits, technical diagnostics, signals theory and 1983 - 2002.    1978-95 Organiser and Head of Measurement Departments of Research Institutes:   1978-82 Meteorology and Water Management IMGW      1983-92, Industrial Chemistry IChP1991-92 Biomedical Technology Center ORMED    1994-95 Electrotechnics IEl.     1992-95 Advisor to Ministry of Education (Head of World Bank Project team), retired 2010-23 Industrial Institute of Automation and Measurements PIAP (part time Main Specialist),   2016-17 Adviser to President of Central Office of Metrology GUM Poland.Author or co-author: 3 monographs on: applications of Hall devices1980; 4-terminal unconventional measurement bridge circuits 2004, extended  methods of uncertainty estimation 2016; 455 papers, many r&d reports, 11 patents in electrical measurement instrumentation. Head of Polish Metrological Society PTM, member of Ukrainian Society: Academy of  Metrologia AMU