Czym jest entropia? [What is entropy?] Dominika Porwisiak (Doctoral School - Environmental Engineering, Mining, and Power Engineering, PWr, Wrocław) The presentation will highlight the different types of entropy, including thermal, information and quantum entropy, emphasizing their fundamental importance in physics and computer science. Attention is given to the impact of entropy growth in electronic devices and its relationship to the efficiency of these devices and the possibility of miniaturization is shown. Also discussed is the use of dilution coolers for quantum computers, which require extremely low temperatures to maintain quantum coherence. This presentation demonstrates the complexity and versatility of entropy in the technological world.