Microsoft Corp. announced quarterly revenue of $21.46 billion for the quarter ended December 31, 2012, an increase of 3% from prior year period. Operating income, net income, and diluted earnings per share for the quarter were $7.77 billion, $6.38 billion, and $0.76 per share.  Operating income was down 3% from prior year period.

Microsoft’s latest quarterly earnings slipped, even as the world’s largest software maker showed modest progress adapting to a shift away from the personal computers that have been its financial foundation for decades.  The results announced Thursday are the first to include Windows 8.  The program is a dramatic overhaul of the Microsoft Corp. operating system that powers most PCs. Windows 8 came out Oct. 26 with slightly more than two months left in Microsoft’s fiscal second quarter.