Sony has achieved convergence and synergy across its music production, distribution, and marketing activities. It brought Columbia Records under its ownership in 1988, allowing it to both produce and distribute music. Sony also develops its own music software. For distribution, it created DADC to manufacture blue ray, DVDs, and CDs in-house. Sony uses its own websites like Music Unlimited and WE 7 to directly distribute music to consumers. It also engages in synergistic marketing through merchandise related to artists it represents.