Microsoft Case May Be Prelude to a Wider Antitrust Battle
Justice Dept ponders whether to broaden its antitrust battle with Microsoft Corp by filing Sherman Act case against computer giant; sweeping case against Microsoft would be landmark test of how smokestack-era doctrine of antitrust applies to high-technology industry; but Washington would prefer to avoid long-running, high-profile Sherman Act case; policy makers and economists say issue is to try to insure that Microsoft's near-monopoly of PC operating-system software is not used to exercise 'chokehold control' over new markets of Internet software and Internet commerce; Sen Orrin G Hatch warns that antitrust scrutiny of Microsoft is preferable to more heavy-handed Government intervention such as an 'Internet Commerce Commission'; there is similar sentiment within Justice Dept; senior official there says 'dialogue' element of Government's dealings with Microsoft would be reopened if only company agreed to discuss ground rules of competition (M)