Microsoft Corp.: The personal computer software company...

Microsoft Corp.: The personal computer software company said its fourth-quarter net income increased 76% to $80 million, compared to the year-ago period. Revenue rose 53% to $337 million. Net income for the 1990 fiscal year increased 64% to $279.2 million, compared to 1989. Revenue for 1990 was up 47% to $1.2 billion. The Redmond, Wash.-based firm attributed its growth to the strong performance of its product lines, especially its Microsoft Windows 3.0 software.