BARCELONA, Spain Just past the security gate for the world's largest cell phone trade show in Barcelona, executives of big mobile carriers can't avoid walking past a booth they would probably rather not see: It's for "Pinger," a small California company that offers free texting in the United States and...

<A HREF="http://www.washingtonpost.com/world/europe/microsoft-unveils-windows-8-for-consumer-testing-shows-off-new-operating-system-in-barcelona/2012/02/29/gIQAgg8fiR_story.html">Read More</A>