Apple shows off iPhone OS 4.0

Multi-tasking and e-books highlight upcoming firmware refresh

Apple has provided the first glimpse into its upcoming iPhone firmware update, which promises upwards of 100 new features for the iPhone and iPod touch devices.

Headlining the new features is multitasking capabilities. Long rumoured to be in the works, the feature will allow users to run multiple third-party apps at the same time.

The feature will not be available to all iPhone versions, however. Apple said that iPhone 3GS and iPod touch models released before late 2009 will not be able to multitask.

Apple also plans to overhaul the iPhone OS interface, allowing users to create folder directories for applications and organise email messages as conversation threads.

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-Ken