AsusTek Computer lnc. (stylized as ASUSTEK or ASUS) is a Taiwanese multinational computer and phone hardware and electronics company headquartered in Beitou District, Taipei, Taiwan. Its products include desktops, laptops, netbooks, mobile phones, networking equipment, monitors, WIFI, routers, projectors, motherboards, graphics card, optical storage, multimedia products, Peripherals, wearables, servers, workstations and tablet PCs. The company is also an original equipment manufacturer (OEM). Asus is the world’s 4th-largest PC vendor by 2015 unit sales. Asus appears in BusinessWeek’s “InfoTech 100” and “Asia’s top 10 IT Companies” rankings and it ranked first in the IT hardware category of the 2008 Taiwan top 10 Global Brands survey with a total brand value of $1.3 billion. Asus has a primary listing on the Taiwan Stock Exchange under the ticker code 2357 and a secondary listing on the London Stock Exchange under a ticker code ASKD.