Smartphone touchscreen device with a slide-out physical keyboard. The first Android device, the HTC Dream, was released in September 2008. Although Android's adoption was relatively slow at first, it started gaining widespread popularity in 2010, and in early 2012 dominated the smartphone market share worldwide, which continues to this day. Android and iPhone devices popularized the smartphone form factor based on a large capacitive touchscreen, and led to the decline of earlier, keyboard- and keypad-focused platforms. Microsoft, for instance, discontinued Windows Mobile and started a new touchscreen-oriented OS from scratch, called Windows Phone. Nokia abandoned Symbian and partnered with Microsoft to
Network operating system Network operating system The term network operating system is used to refer to two rather different concepts: Network operating systems can be embedded in a router or hardware firewall that operates the functions in the network layer (layer 3)."" Early microcomputer operating systems such as CP/M, DOS and classic Mac OS were designed for one user on one computer. As local area network technology became available, two general approaches to handle sharing arose. In a peer-to-peer network operating system users are allowed to share resources and files located on their computers and access shared resources from others. This system is