The Fixed-function unit theme is a theme that has captured the interest of many people over time. Since its emergence, Fixed-function unit has been the subject of debates, discussions and numerous investigations. Its relevance extends to different fields, since it has an impact on society, the economy, technology and many other areas. Fixed-function unit is a topic that has evolved and adapted to social and cultural changes, always remaining at the forefront of public attention. In this article, we will explore the different aspects of Fixed-function unit and its importance in today's world.