SMVDU Katra, December 2019. Dr. Rakesh Kumar, Faculty, School of Mathematics, Shri Mata Vaishno Devi University (SMVDU), delivered an invited talk in an international conference on Mathematics in Space and Applied Sciences (ICMSAS-2019) organized by Department of Mathematics, NSCBM Government College, Hamirpur, Himachal Pradesh, India, during 29-30 November, 2019. This conference was sponsored by the National Board for Higher Mathematics (NBHM), and Defence Research and Development Organization (DRDO). The conference witnessed a huge participation from all over the world, and a total of 250 research papers were presented. The keynote address was delivered by Prof. G.P. Rao, member UNESCO-EOL Joint Committee (UAE). Other invited speakers were Dr. S.K. Pal, Scientist-G (DRDO), Prof. (Dr.) Anil Vashisth & Prof. (Dr.) Rajneesh Kumar from Kurukshetra University, Prof. (Dr.) R.P. Sharma, Prof. (Dr.) Veena Sharma & Prof. (Dr.) J. S. Dhiman from H.P.U. Shimla, Prof. (Dr.) K. L. Verma (Career Point University, Hamirpur), Dr. Tarun Sharma (G.M.C. Kangra) and Prof. (Dr.) Dr. Gajendra Pratap Singh (J. N. U., New Delhi). A number of deliberations were made on the applications of Mathematics in Space, and in applied sciences. Dr. Kumar discussed the mathematical modelling of Queuing Systems and their applications. Dr. Kumar has expressed his deep sense of gratitude towards the organizers of the conference for inviting him in this prestigious conference. He has also thanked the Vice-Chancellor, SMVDU, Prof. (Dr.) Ravindra Kumar Sinha for his support and encouragement.