Traditionally within the activities to mark the World Metrology Day on May 20, we were visited by our dear guests, the Students of the Faculty of Mathematics University of Priština from Kosovska Mitrovica. Students of the second year within teaching from subject Metrology and measuring results processing with Branko Drljača, Assistant Professor had opportunity to be introduced with the importance and history of Metrology in Serbia and work of National Metrology Institute (DMDM). Study visit was continued visiting laboratories for temperature, DC voltage, time, frequency, photometry, large volumes, length, acoustics and mass where Metrologists presented them realized calibration methods and research projects the DMDM participates in.