 On tablets and smartphones, the situation is the opposite, with Unix-like operating systems dominating the market, including the iOS (BSD-derived), Android, Tizen, Sailfish and Ubuntu (all Linux-derived).Microsoft's Windows phone, Windows RT and Windows 10 are used on a much smaller number of tablets and smartphones.However, the majority of Unix-like operating systems dominant on handheld devices do not use the X11 desktop environments used by other Unix-like operating systems, relying instead on interfaces based on other technologies.