Just a few days after the release of the Apple iPhone, questions are being raised related to the development opportunities are available and what software the iPhone runs.

According to Apple VP of Worldwide iPod Marketing, Greg Joswiak, the iPhone operating system is a full version of OS X that weighs in at “considerably less” than half a GB and sits on flash memory.

Joswiak noted; “Apple has a proven and very smooth update mechanism for everything from our computers to our iPods. We will follow that kind of model here, which is an advantage a lot of phones don’t have.”

The Apple VP went onto describe how it was possible for the OS to be reduced in size so much, he said that it was possible due to the expertise at Apple and none of the functionality or core functions have been removed. “Remember that OS X on a Mac features a lot of applications that we don’t have to ship on the iPhone,” he added.

The OS sits on in-built flash memory which is considered much more versatile than a hard drive and allows the size of a device to be reduced considerably. “Flash has some nice advantages for us in putting it in that form factor. It’s very small and very durable,” Joswiak said.