Microsoft

Saying its customers "have a right to know when the government obtains a warrant to read their emails" — and that Microsoft has a right to tell them about gag orders — the tech giant has filed a lawsuit against the U.S. Justice Department.

Microsoft is asking a judge to declare part of a federal law, specifically 18 U.S.C. § 2705(b), unconstitutional under both the First and Fourth Amendments.

As NPR's Aarti Shahani reports for our Newscast unit:

Microsoft CEO Steve Ballmer, who succeeded founder Bill Gates as CEO, will retire within the next 12 months. The world's biggest software company did not name a successor, but one long-time Microsoft watcher says he expects the company to hire its next chief from within.

Microsoft Corp.'s stock rose more than 7 percent after the news. 

Just last month, Ballmer reorganized the company to emphasize hardware devices and services, rather than just software.

PORTLAND, Maine – A small technology company based in Portland, Maine, has filed a patent infringement lawsuit against Microsoft over elements included in Windows 8.