The book is the result of a set of research, including two undergraduate TCCs, a specialization PCC and two articles. They are: Knowledge Management Tools applied in a Hospital Unit; Business Plan of a women's fashion E-commerce; Development of relationship marketing actions for the Cantrelle Design brand; The impact of knowledge storage for better business performance and mental health of the microentrepreneur and self-employed; Analysis of the poetics of the duolingo application interface.