Smartphone use Windows Phone on its smartphones. Windows Phone became the third-most-popular smartphone OS, before being replaced by Windows 10 Mobile, which declined in share to become "largely irrelevant" at less than 0.5% of the smartphone market. Palm replaced their Palm OS with webOS. BlackBerry Limited, formerly known as Research In Motion, made a new platform based on QNX, BlackBerry 10, with which it was possible to control a device without having to press any physical buttons; this platform was later discontinued. By the mid-2010s, almost all smartphones were touchscreen-only, and Android and iPhone smartphones dominated the market. In 2013, Fairphone
Copland (operating system) its window. Programs that are not in the foreground are periodically given short bits of time to run, but as before, the entire process is controlled by the applications, not the operating system. Because the operating system and applications all share a single memory space, it is possible for a bug in any one of them to corrupt the entire operating system, and crash the machine. This is not particularly annoying under a single-application model, in which case the application crashes anyway. But under MultiFinder, any crash will crash all the other running programs as well. The multitasking of multiple