The US Department of Justice has begun a preliminary investigation of the mainframe computer market, potentially drawing fresh scrutiny of dominant mainframe maker IBM more than half a century after US regulators first took action to curb its power. IBM said it understood a competitor had been approached by regulators over the issue, and that it would “co-operate with any inquiries”. The moves appear to echo a similar enquiry opened by European regulators two years ago, though the precise focus of the DoJ’s review is unclear.
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