Errata

Desktop systems. ... They typically do not have the same reliability as embedded systems, as they can have a large range of hardware and software installed on them. A small software or hardware bug can cause the whole system to act unreliably.

Typical services are for WWW services, Internet access services, file transfer services, printer services, and electronic mail services.

Optimization control/data has a lower priority than regularity obligation control/data, which in turn has a lower priority than safety critical control/data.

Page 244.
... to create a data stream from one application to another, just as if the two programs were running on the same computer.