The document discusses the concept of "core competence" introduced by Prahalad and Hamel in their 1990 Harvard Business Review article. They argue that a corporation's core competence lies in its collective learning and skills that make it unique, rather than in its individual business units. Developing core competencies allows companies to access new markets and strengthen competitive advantage. The authors provide examples of how companies like Canon and NEC identified and built upon their core competencies in semiconductors and computing to achieve industry leadership.