Chipmaker ARM believes netbooks will make up 90 percent of the PC market, according to the company's chief executive Warren East. ARM is the biggest competitor to Intel's Atom CPUs in the netbook market, and East believes the company will not rely on Windows support in order to be successful. In a typical netbook, the main chip is usually an Intel or AMD device, with two or three ARM microprocessors for features such as Bluetooth or Wi-Fi and East says ARM is trying to change that.