Tandem computers are employed extensively in heavy volume, OnLine Transaction Processing environments. Tandem systems can be found in 24 of the top 25 US banks; 32 of the top 50 European banks; 250 brokerage and security firms; 60 major insurance companies; and in 40of the world s busiest stock and commodities exchanges. Tandem computers run 75% of all automated teller machine transactions, 66%...