sentences:  Similar models have appeared since in the loose combination of SQL databases and objected oriented languages such as Java, often referred to as object-relational models and widely used in large scale distributed systems today.The paradigm is likely to appear on desktop computers as microprocessors increase the number of processors (multicore) per chip.The Actor model might usefully be described as a specialized kind of process-oriented system in which the message-passing model is restricted to the simple fixed case of one infinite input queue per process (i.e.