The essentials for iPhone OS 4.

comappleiPhone_OS_4_0_spotlight_lets_you_directly_search_web_Wiki Apple did quite a bit today bringing its iPhone OS up.

All that great stuff we just heard about iPhone OS 4 multitasking tentpoles app folders Game Center iAd okay maybe you werent all that.

The curtain has been pulled back on iPhone 4 and the list of new features is massive Theres multitasking finally a refreshed interface and literally hundreds of other changes all coming this summer.

So now that Apples finally addressed well sort of addressed the 800pound gorilla known as multitasking its time to take a good hard look at.

This is iPhone OS 4 running on an iPhone 3GS. 0 and it suggests that Apple.

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Close TUAW reader AW sent us this screen shot that shows an iChatAgent process showing up in iStat 0. comappleiPhone_OS_4_hands_on_Engadget Okay so were currently holding our breath while the developer preview of iPhone.

This video was recorded the night before Apples big iPhone OS 4. 99 in the App Store on an iPhone running the new iPhone OS 4. With the announcement live now I want to focus on talking about. Heres the full rundown. The community speculated as to what could be coming with the next iteration of the OS.

Sure you devoured every word of the liveblog or perhaps just casually refreshed throughout the day who are we to judge but if you want.

Apple has posted a preview page covering the various iPhone 4 announcements today. Even though its not finished its surprisingly usablenot nearly as slow as iPhone 3 beta running on iPhone 3G last year. The process is new to iPhone OS 4.

digg_url httpdigg. Notably they list device compatibility for the iPhone 4 OSiPhone OS 4 will work with iPhone 3G iPhone 3GS and th.

“editsection”> <span Expo on January 9, 2007, as the primary operating system of the iPhone, which was released in June of that year. Initially, Apple had no plans to release a software development kit (SDK) for the OS, which meant the only third-party applications with official support were web applications.

The OS had no official name until March 6, 2008, when the first beta version of the iPhone SDK was released. Before then, Apple marketing literature simply said that the “iPhone uses OS X”.

As of April 8, 2010 (2010 -04-08), there were more than 185,000 applications available for the iPhone OS with over four billion downloads.

User interface

The user interface of iPhone OS is based on the concept of direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. The response to user input is supposed to be immediate to provide a fluid in