U.S. JUDGE DECLARES MICROSOFT IS A MARKET-STIFLING MONOPOLY; GATES RETAINS DEFIANT STANCE
Federal Judge Thomas Penfield Jackson issues broad denunciation of Microsoft Corp in landmark antitrust case, ruling that company is monopoly that uses power to stifle innovation, reduce competition and hurt consumers; 207-page findings of fact says company, through its conduct, demonstrates it will use prodigious market power and immense profits to harm any firm that insists on pursuing initiatives that could intensify competition against one of its core products; finds government's case against company credible and rejects as 'specious' virtually all arguments Microsoft offered in defense; his findings detailed; Justice Department is jubilant; Atty Gen Janet Reno hails ruling as great day for American consumers; Microsoft chairman William Gates says he disagrees with many of court's findings; says company operates within laws and in way that is beneficial to consumers; says it competes vigorously and fairly and is committed to resolving case in fair and equitable manner; photos (L)