In the PC world, there's pretty much one operating system that dominates the scene: Microsoft Windows. Sure, there's also Apple and Linux, too, but there's an advantage to having one dominate operating system -- it draws programmers to develop applications for it.

In the cellphone world, that's not the case. About a year ago, I wrote a story about how mobile phone carriers are starting to pick and choose which operating systems they want to support, narrowing the field from dozens to three or four.

For them, it is about cutting costs and efficiencies. It takes time to get all of their specialized programs -- like mobile TV -- on each and every phone. So logically fewer is better.

The New York Times wrote a similar story today.

Doesn't look like much has changed, but the NYT said that Vodafone, the world's largest mobile phone company, has declared will eventually sell only phones that ran on Microsoft's Windows Mobile, Symbian Series 60 or Linux systems. And that NTT DoCoMo of Japan has concentrated on Symbian and Linux.