I started working at the company "Leggato" as a storekeeper and then climbed my career ladder, only because I acquired a wide range of technical knowledge during the studies of applied physics: starting with acoustics, geometrical optics, strength of materials or computer graphics. The basis of acquired knowledge is enough for successful work, but deeper knowledge of physical phenomena and their application, as well as mathematical calculation or modelling, is necessary for career development. Studies of physics have taught me to find analytical solutions of technical problems. I am glad that studies not only expanded my knowledge horizons, but also created a strong scientific ground. At work, I constantly apply the knowledge, acquired during Bachelor and Master degree studies of applied physics. I could not identify the most significant modules, because all of them were significant and useful.