PSI Resources Inc is a result of a merger between PSI Energy Inc and Cincinnati Gas and Electric Co which came into being in 1993. The combined entity serves about 1.3 million electric customers and 400,000 gas customers in a 25,000 square mile area of Indiana, Ohio and Kentucky. Sales to residential customers accounted for 35% of 1993 revenues; industrial customers, 28%; commercial customers, 23% & other, 14%.