It drives me nuts to hear business proponents using the term realtime for web-based systems. I\'m becoming the crazy in the room, chanting, \"There is no such thing as real
One definition of a real time system ( from the safety critical systems world ) is a system whose correctness depends on the timeliness of its responses.
That would apply equally well for a real-time web trading system - the stock values go stale in seconds as for an embedded avionics fly-by-wire system with millisecond correctness requirements.