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By Doug Tsuruoka
Investor's Business Daily
Mainframe computers are slimming down. Once 2-ton monsters costing millions each, some now go for as little as $750,000 and are as small as refrigerators.
The mainframe makeover continues with the leading seller of the machines, IBM Corp., jumping to the next stage. This week it unveiled new operating system software designed to make using them easier and cheaper.
"The mainframe's coming back, and this (operating system) makes it easier for customers to manage business and worry less about computing infrastructure decisions," said Peter McCaffrey, a director of e-server technology for IBM.
More Competitive With Sun
The new operating system is expected to help Big Blue's mainframes compete against …