Google later changed its Android specification documents to state that "Touchscreens will be supported", although "the Product was designed with the presence of discrete physical buttons as an assumption, therefore a touchscreen cannot completely replace physical buttons".
By 2008, both Nokia and Black Berry announced touch-based smartphones to rival the i Phone 3G, and Android's focus eventually switched to just touchscreens.
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The first commercially available smartphone running Android was the HTC Dream, also known as T-Mobile G1, announced on September 23, 2008.
On November 5, 2007, the Open Handset Alliance, a consortium of technology companies including Google, device manufacturers such as HTC, Motorola and Samsung, wireless carriers such as Sprint and T-Mobile, and chipset makers such as Qualcomm and Texas Instruments, unveiled itself, with a goal to develop "the first truly open and comprehensive platform for mobile devices".
Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.
Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, with the first commercial Android device launched in September 2008.
This status bar can be "pulled" down to reveal a notification screen where apps display important information or updates.
Beginning with Android 4.1 "Jelly Bean", "expandable notifications" allow the user to tap an icon on the notification in order for it to expand and display more information and possible app actions right from the notification.
Steve Perlman, a close friend of Rubin, brought him ,000 in cash in an envelope, and shortly thereafter wired an undisclosed amount as seed funding.
Perlman refused a stake in the company, and has stated "I did it because I believed in the thing, and I wanted to help Andy." At Google, the team led by Rubin developed a mobile device platform powered by the Linux kernel.
Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets.