XML Internet OS (XIOS) / icloud

The OS runs also offline, without a network connection or with a weak connection, as long as it was booted while the network connection was up. This is probably one of the first times a web application may continue to operate in an offline mode. The code is not running on the Internet servers, it is executing within the OS on the local client and only started through the servers.

The OS also includes a transaction manager, keeping track of all data changed produced by the applications on the OS. This makes XIOS stand out as a class of it own compared to other Internet services when it comes to reliability and stability.