i Operating Systems (iOS) -By G.Goutham Kumar Reddy
OUTLINE Introduction History Working Process Technologies Advantages Disadvantages Conclusion
INTRODUCTION iOS (formerly iPhone OS) is a mobile operating system originally developed for the iPhone later extended to ipad and ipod. iOS is derived from Mac OS X, with which it shares the Darwinfoundation, and is therefore a Unix-like operating system. Apple licenses the trademark for "iOS" from Cisco Systems (who own IOS).
HISTORY The operating system was unveiled with the iPhone at the Macworld Conference & Expo, January 9, 2007, and released in June of that year. On March 6, 2008, Apple released the first beta, along with a new name for the operating system: "iPhone OS”. In June 2010, Apple rebranded iPhone OS as "iOS". Apple licensed the "IOS" trademark from Cisco.
Version History iOS 1.x: initial OS release iOS 2.x: second major OS release iOS 3.x: third major OS release iOS 4.x: fourth major OS release iOS 5.x: fifth major OS release
In iOS, there are four abstraction layers: the Core OS layer, the Core Services layer, the Media layer, and the Cocoa Touch layer. The current version of the operating system(iOS 5.0.1) uses roughly 770 megabytes of the devices storage, varying for each model.
Cocoa Touch Layer The Cocoa Touch layer contains the key frameworks for building iOS applications. This layer defines the basic application infrastructure and support for key technologies such as multitasking, touch-based input, push notifications, and many high-level system services.
Media Layer The Media layer contains the graphics, audio, and video technologies geared towards creating the best multimedia experience available on a mobile device.
Core Services Layer The Core Services layer contains the fundamental system services that all applications use. iCloud Storage
Core OS Layer The Core OS layer contains the low-level features that most other technologies are built upon.
iPhone At the Macworld Conference & Expo in January 2007, Steve Jobs revealed the long anticipated iPhone, a convergence of an Internet- enabled smartphone and iPod. . The iPhone features a 3.5-inch (89 mm) touch screen display, 4, 8, or 16 GB of memory, Bluetooth, and Wi-Fi (both "b" and "g"). The iPhone first became available on June 29, 2007 for $499 (4 GB) and $599 (8 GB) with an AT&T contract. On October 4, 2011, Apple unveiled the iPhone 4S.
iPad On January 27, 2010, Apple introduced their much-anticipated media tablet, the iPad running a modified version of iOS. Offers multi-touch interaction with multimedia formats including newspapers, magazines, ebooks, textbooks, phot os, movies, TV shows videos, music, word processing documents, spreadsheets, video games, and most existing iPhone apps. On March 2, 2011, Apple introduced an updated iPad model which had a faster processor and two cameras on the front and back respectively.
iPod On October 23, 2001, Apple introduced the iPod digital music player. The iPod is the market leader in portable music players by a significant margin, with more than 220 million units shipped as of September 2009. iPod Shuffle iPod Nano iPod Classic
Apple Tv Apple TV is a digital media receiver developed and sold by Apple. Apple offered a preview of the device in September 2006 and began shipping it the following March.It initially shipped with a 40 GB hard disk; a 160 GB version was introduced two months later and the earlier model was ultimately discontinued. Apple TV allows consumers to use an HDTV set to view photos, play music and watch video that originates from limited Internet services or a local network.
DISADVANTAGES Semi-thread message There is no real features upgrade for iPod Unlock way is complicated Mail does not support the attachment directly
CONCLUSION Thus, iOS is Apples mobile operating system developed originally for the iPhone later extended to iPad and iPod as well. Apple licenses the trademark for "iOS" from Cisco Systems (who own IOS), the same company with which Apple had earlier settled a dispute over the "iPhone" trademark. iOS 4 is the first version of the OS to be a free upgrade on the iPod touch; Apple had charged $9.99 for earlier upgrades.