IBM has transformed from focusing on technology like mainframes in the 1960s to providing IT solutions and customization today. Key transitions include launching the IBM PC in the 1980s, reorganizing into a client-centered model in the 1990s, and acquiring businesses to expand offerings in the 2000s. Continuous leadership and an innovative culture have helped IBM adapt to changes in the external environment through both episodic and continuous organizational changes. This has allowed IBM to remain a leader in its field over several decades.