Mobile operating system share of operating systems. However, variations occur in popularity by regions, while desktop-minority also applies on some days in regions such as United States and United Kingdom. Mobile operating system milestones mirror the development of mobile phones and smartphones: These operating systems often run atop baseband or other real time operating systems that handle hardware aspects of the phone. Android (based on the modified Linux kernel) is a mobile operating system developed by Google Inc. Besides having the largest installed base worldwide on smartphones, it is also the most popular operating system for general purpose computers (a category that includes
Smartphone U.S. and Japan, Nokia was seeing success with its smartphones based on Symbian, originally developed by Psion for their personal organisers, and it was the most popular smartphone OS in Europe during the middle to late 2000s. Initially, Nokia's Symbian smartphones were focused on business with the Eseries, similar to Windows Mobile and BlackBerry devices at the time. From 2006 onwards, Nokia started producing consumer-focused smartphones, popularized by the entertainment-focused Nseries. Until 2010, Symbian was the world's most widely used smartphone operating system. In the 2000s, it was common for smartphones to have a physical T9 numeric keypad or QWERTY