Blue Star Ltd. engages in the provision of manufacture, trade and installation of air conditioning systems. It operates through the following segments: Electro -Mechanical Projects and Commercial Air Conditioning Systems, Unitary Products, and Professional Electronics and Industrial Systems. The Electro-Mechanical Projects and Commercial Air Conditioning Systems segment includes central air-conditioning projects, Electrical Contracting business and Packaged air-conditioning businesses including manufacturing and after sales service. The Unitary Products segment focuses on the cooling appliances, cold storage products, including manufacturing and after sales service. The Professional Electronics and Industrial Systems segment provides trading and services for testing machines, medical, analytical, test & measuring, data communications, industrial products and systems. The company was founded by Mohan T. Advani in 1943 and is headquartered in Mumbai, India.