Samsung holds a 10% stake in Sungjin Geotec, an offshore oil drilling company that is a subsidiary of POSCO. Taylor Energy is an independent American oil company that drills in the Gulf of Mexico based in New Orleans, Louisiana. Samsung Oil & Gas USA Corp., subsidiaries of Samsung, currently owns 20% of Taylor Energy. Samsung owns 5% of Wacom. Major clients of Samsung include: The basic color in the logo is blue, which Samsung has employed for years, supposedly symbolizing stability, reliability and corporate social responsibility. Samsung has an audio logo, which consists of the notes E♭, A♭, D♭, E♭; after
Samsung Lee's death in 1987, Samsung was separated into four business groups – Samsung Group, Shinsegae Group, CJ Group and Hansol Group. Since 1990, Samsung has increasingly globalised its activities and electronics; in particular, its mobile phones and semiconductors have become its most important source of income. As of 2017, Samsung has the 6th highest global brand value. Notable Samsung industrial affiliates include Samsung Electronics (the world's largest information technology company, consumer electronics maker and chipmaker measured by 2017 revenues), Samsung Heavy Industries (the world's 2nd largest shipbuilder measured by 2010 revenues), and Samsung Engineering and Samsung C&T (respectively the world's