 When computers usually had a single processor, this was useful when a lot of I/O was going on; now that machines usually have multiple processors, this is starting to become useful when processes are CPU-intensive as well.The diagram in this section shows a single "Load Balancer" process distributing data between 3 processes, labeled S1, S2 and S3, respectively, which are instances of a single component, which in turn feed into a single process on a "first-come, first served" basis.In this general schematic, requests (transactions) coming from users enter the diagram at the upper left, and responses are returned at the lower left.