Mesosphere:

Apple announced during a Wednesday night meetup at its Cupertino, California, headquarters that the company’s popular Siri application is powered by Apache Mesos.

We at Mesosphere are obviously thrilled about Apple’s public validation of the technology on which our Datacenter Operating System is based. If Apple trusts Mesos to underpin Siri — a complex application that handles Apple-only-knows-how-many voice queries per day from hundreds of millions of iPhone and iPad users — that says a lot about how mature Mesos is and how ready it is to make a big impact in companies of all stripes.

This might be a little too “inside baseball” for most people but it’s interesting if only for fact Apple “opened the Kimono” to a segment of the developer community. I think it’s yet another sign of Apple being a little less closed off and secretive and acknowledging that others need and want to know their future plans.