Enlarge / Multi-threading. (credit: Jamie Golden / Flickr) Not content with having a Windows-based Internet of Things platform (Windows 10 IoT) and a Linux-based Internet of Things platform (Azure Sphere), Microsoft has added a third option. The company has announced that it has bought Express Logic and its ThreadX real-time operating system for an undisclosed sum. Real-time operating systems (RTOSes) differ from more conventional platforms in their predictability.