Symbian History

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The Symbian platform was created by merging and integrating software assets contributed by Nokia, NTT DoCoMo, Sony Ericsson and Symbian Ltd., including Symbian OS assets at its core, the S60 platform, and parts of the UIQ and MOAP(S) user interfaces.

In December 2008, Nokia bought Symbian Ltd., the company behind Symbian OS; as a result, Nokia has become the major contributor to Symbian's code, as it now had the development resources for both the Symbian OS core and the user interface. Since then, Nokia has been maintaining their own code repository for the platform development, regularly releasing their development to the public repository.[6] File
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Symbian

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Symbian is an open source operating system (OS) and software platform designed for smartphones and currently maintained by Nokia. The Symbian platform is the successor to Symbian OS and Nokia Series 60; unlike Symbian OS, which needed an additional user interface system, Symbian includes a user interface component based on S60 5th Edition. The latest version, Symbian^3, was officially released in Q4 2010, first used in the Nokia N8.

Symbian OS was originally developed by Symbian Ltd.[3] It is a descendant of Psion's EPOC and runs exclusively on ARM processors, although an unreleased x86 port existed.

Devices based on Symbian accounted for 43.5% of worldwide smartphone sales in 2010 Q2.[4] Some estimates indicate that the cumulative number of mobile devices shipped with the Symbian OS up to the end of Q2 2010 is 385 million.[5]
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s60 5th edition

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In October 2008, S60 5th Edition was launched. (Nokia decided to move from 3rd Edition directly to 5th Edition "as a polite gesture to Asian customers",[4] because the number four means bad luck in some Asian cultures). S60 5th Edition runs on Symbian OS version 9.4.[5] The major feature of 5th Edition is support for high-resolution 640×360 touchscreens; before 5th Edition, all S60 devices had a button-based user interface. S60 5th Edition also integrates standard C/C++ APIs and includes Adobe Flash Lite 3.0 with S60-specific ActionScript extensions that give Flash Lite developers access to phone features like contacts, text messaging, sensors and device location information (GPS).

The S60 5th Edition is the last edition of S60. Its assets along with Symbian OS, UIQ and MOAP(S) have been used as a base for Symbian, an open source operating system being developed by the Symbian Foundation. The first edition of Symbian, Symbian^1, uses S60 5th Edition on top of Symbian OS 9.4 as its base.
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s60 3rd edition

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s60v3 uses a hardened version of Symbian OS (v9.1), which has mandatory code signing. In S60v3, a user may install only programs that have a certificate from a registered developer, unless the user disables that feature or modify the phone's firmware through third-party hacks that circumvent the mandatory signing restrictions. This makes software written for S60 1st Edition or 2nd Edition not binary-compatible with S60v3.

In 2006, a "Designed for S60 Devices" logo program for developers was launched. The logotype can be used with conforming programs (Symbian or Java).
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s60 2nd edition

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There have been four major releases of S60: "Series 60" (2001), "Series 60 Second Edition" (2003), "S60 3rd Edition" (2005) and "S60 5th Edition" (2008). In Series 60 1st Edition, the devices' display resolution was fixed to 176×208. Since 2nd Edition Feature Pack 3, Series 60 supports multiple resolutions, i.e. Basic (176×208), and Double (352×416). Nokia N90 was the first S60 device to support a higher resolution (352×416). Some devices, however, have non-standard resolutions, like the Siemens SX1, with 176×220. Nokia 5500 Sport has a 208×208 screen resolution, and the Nokia E90 with its wide 800×352 inner display.
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