Innovations have absolutely fundamental importance in the creation of enterprises’ competitiveness. There are a lot of sources of innovations, both external and internal. The innovations’ sources can be formal or informal, too. First of all, research and development play an important role in the creation of new technologies and products. Moreover, knowledge workers, based on their core competences and skills, are the main creators of new solutions. Finally, the internal sources can cause the creation of relatively sustainable competitive advantage in global market.