Operating systems in Nokia phones

Operating system of ruless in Nokia phonesIntroductionOperating system essentially acts as interface between habitr and hardware. A industrious operational system also known as mobile OS or a handheld operate system controls the mobile device. It works on the same principle as the operating systems in windows which control the desktop computers. However the mobile operating systems are simpler than that of windows operating systems.Various operating systems used in smart phones allow in Symbian OS, Iphone OS, RIMS Blackberry, Linux Palm webOS, Android Windows mobile operating system.Various operating systems along with their detail are1) Symbian OSSymbian operating system is concepted for mobile devices with associated libraries, user interface, and framework.It is used in various models of the phones around 100 models use this. It consists of kernel and middleware components of software stack. The upper layers are supplied by lotion platforms like S60, UIQ and MOAP.This is NOKIA N92 with Symbian OS.Reasons for designing Symbian OS To ensure the integrity and security of data, Utilize the user measure, further resources are scarce.Designing of Symbian OSIt uses a microkernel which has a request and call-back approach to services. It maintains the separation between user interface and design. Mobile view ascendance is the object oriented design used by the applications and the OS. This OS is optimised for low power battery based devices and for ROM based systems.The Symbian kernel supports sufficiently-fast real time response to build a single-core phone around itthat is, a phone in which a single processor core executes both the user applications and the mansion stack.Structure of Symbian modelUI Framework LayerApplication services layer Java MEOS services layer Generic OS services colloquy services Multimedia and graphics services Connectivity servicesBase services layerKernel services and hardware interface layer.It uses microkernel architectur e i.e., it includes only the needful parts in order to maximize the robustness, responsiveness and availability. It contains scheduler, memory management and device drivers. Symbian is designed to emphasize compatibility with other devices, especially removable media file systems. at that place is a large networking and communication subsystem, which has three main servers called ETEL i.e, EPOC telephony, ESOCK i.e, EPOC sockets and C32 which is responsible for serial communication. Each of these has a plug-in scheme. All native Symbian C++ applications are built up from three framework classes defined by the application architecture an application class, a document class and an application user interface class. These classes create the essential application behaviour.Symbian includes a reference user-interface called TechView. It provides a basis for starting customization and is the environment in which much Symbian test and example code runs.Versions of Symbian OSSymbian OS v6. 0 and 6.1Symbian OS 7.0 and 7.0sSymbian OS 8.0Symbian OS 8.1Symbian OS 9.0Symbian OS 9.1Symbian OS 9.2Symbian OS 9.3Symbian OS 9.4Symbian OS 9.52) Iphone OSIt is internet and multimedia mobile phone designed by apple Inc. The Iphone functions as a camera phone, a portable media player, and an internet client.Iphone OS is an operating system that runs on Iphone. It is based on the same DARWIN operating system used in MAC OS X. It is responsible for the interfaces motion graphics. The operating system takes up less than half a GB of the devices list storage (4 to 32GB). It is capable of supporting bundled and future applications from Apple, as well as from third-party developers. Software applications fundamentnot be copied directly from Mac OS X but must be written and compiled specifically for Iphone OS.Like the iPod, the Iphone is managed with iTunes. The earliest versions of Iphone OS required version 7.3 or later, which is compatible with Mac OS X version 10.4.10 tiger or late r, and 32-bit or 64-bit Windows XP or Vista. The release of iTunes 7.6 expanded this support to include 64-bit versions of XP and Vista, and a workaround has been discovered for previous 64-bit Windows operating systems. Apple provides free updates to Iphone OS by iTunes, and major updates have historically accompanied new models. Such updates often require a newer version of iTunes for example, the 3.0 update requires iTunes 8.2 but the iTunes system requirements have stayed the same. Updates include both security patches and new features. For example, Iphone 3G users initially experienced dropped calls until an update was issued.3) Android OS Android is a mobile operating system cartroad on the Linux kernel. It allows developers to write managed code in the Java language, controlling the device via Google-developed Java libraries.The unveiling of the Android distribution on 5 November 2007 was announced with the founding of the give way Handset Alliance, a consortium of 47 ha rdware, software, and telecom companies devoted to advancing open standards for mobile devices. 4) Palm webOSIt is a mobile operating system running on the Linux kernel with proprietary components developed by Palm. The Palm Pre Smartphone is the first device to launch with webOS, and both were introduced to the public at the Consumer Electronics Show. The Palm Pre and webOS were released on June 6, 2009. The blink of an eye device to use the operating system, the Palm Pixi, was released on November 15, 2009. The webOS features significant online social network and Web 2.0 integration.Features WebOSs graphical user interface is designed for use on devices with touch screens. It includes a suite of applications for personal information management and makes use of a number of web technologies such as HTML 5, JavaScript, and CSS. Palm claims that the design around these existing technologies was intended to spare developers from learning a new programming language. The Palm Pre, relea sed on June 6, 2009, is the first device to run this platform.5) Rims Blackberry OSA proprietary multi-tasking operating system (OS) for the BlackBerry is provided by RIM which makes heavy use of the devices specialized input devices, particularly the scroll wheel or more recently the trackball and track pad. The OS provides support for Java MIDP 1.0 and WAP 1.2. Previous versions allowed wireless synchronization with Microsoft Exchange Servers e-mail and calendar. The current OS 4 provides a subset of MIDP 2.0, and allows complete wireless activation and synchronization with Exchanges e-mail, calendar, tasks, notes and contacts.Third-party developers can write software using these APIs, proprietary BlackBerry APIs as well, but any application that makes use of certain restricted functionality must be digitally signed so that it can be associated to a developer account at RIM. There is only the guarantee of authorship of an application but not of the quality or security of the code. This is blackberry 7250 displaying the icons provided to it by the use of a proprietary multi-tasking operating system (OS).6) Windows mobile operating systemsWindows Mobile is a compact operating system developed by Microsoft, and designed for use in smartphones and mobile devices.It is based on Windows CE, and features a suite of basic applications developed using the Microsoft Windows API. It is designed to be somewhat similar to desktop versions of Windows, feature-wise and aesthetically. Additionally, third-party software development is available for Windows Mobile, and software can be purchased via the Windows Marketplace for Mobile.Originally appearing as the Pocket PC 2000 operating system, Windows Mobile has been updated multiple times, with the current version being Windows Mobile 6.5. to the highest degree Windows Mobile phones come with a stylus pen, which is used to enter commands by tapping it on the screen. Windows Mobiles share of the Smartphone market has fallen ye ar-on-year, decreasing 20% in Q3 2009. It is the fourth most popular Smartphone operating system, with a 7.9% share of the worldwide Smartphone market.The figure showing windows operating system used in smartphones.