Celestica may not be the mother of all board makers, but it definitely ranks among the leaders. One of the world's top electronics manufacturing services (EMS) companies, Celestica's output is mainly complex printed circuit assemblies, such as PC motherboards and communication and networking cards. These assemblies end up in servers, workstations, PCs, peripherals, and communications devices. Celestica also offers supply chain management, as well as design, global distribution, and post-sales repair services. Major customers include IBM and Juniper Networks. The Asia/Pacific region provides about 70% of Celestica's sales. Canadian investment firm Onex controls 71% of the company's voting power.