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Hallador Energy Co is a coal mining company with operations in Indiana, USA, and it is part of the electric power generation industry. The operations of the company are divided into two primary reportable segments, the Coal Operations and Electric Operations segments. The majority of revenue is earned from the Coal Operations segment.
Alpha & Omega Semiconductor Ltd designs, develops and supplies a portfolio of power semiconductors targeting various applications, including personal computers, flat-panel TVs, LED lighting, smartphones, battery packs, consumer and industrial motor controls and power supplies for TVs, computers, servers and telecommunications equipment. It generates revenue mainly from the sale of power semiconductors, consisting of power discretes and power ICs with a presence in Hong Kong, China, South Korea, the United States and other countries.