A much smaller US rival, T3 Technologies, is due to lodge a complaint with the European Commission alleging that IBM has abused its market position by tying the sale of its operating system to its mainframe hardware, preventing sales of competing hardware products.
It will also claim that the US giant has withheld patent licences and other intellectual property to the detriment of mainframe purchasers in Europe.
The move is likely to reinvigorate Brussels' questioning of IBM's operations. EU officials started to look at the computer group's mainframe activities in late 2007 in the wake of a similar complaint from Platform Solutions Inc, a Silicon Valley start-up, which had also been pursuing an antitrust suit against IBM in the US.
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