Computers are everywhere, accumulating gigabytes galore.
But help is on the way in the form of a new class of software technology known broadly as data mining. The payoffs can be huge, as MCI Communications Corp. is learning. Like other phone companies, MCI wants to keep its best customers. One way is to identify early those who might be considering jumping to a rival. If it can do that, the carrier can try to keep the customer with offers of special rates and services, for example.