A Microsoft-branded tablet wouldn't come as a complete surprise. In April, Microsoft announced a $300 million, 17.6 percent stake in Barnes & Noble's Nook e-book business.
Microsoft Corp.'s next operating system, Windows 8, is designed to run desktop, laptop and tablet computers. PC makers are hoping it offers them a better chance to compete with Apple Inc.'s iPad. Windows 8 is expected to be released in September or October, in time for devices that ship for the holiday season.
"This will be a major Microsoft announcement - you will not want to miss it," the company said in an email invite to the media on Thursday. A company spokesman declined to comment further.
The event, set to start at 3:30 p.m. Pacific time, is being kept under such tight wraps that the company has declined to provide its location until Monday.
(Copyright 2012 by The Associated Press. All Rights Reserved.)