This story initially gave the wrong day of Microsoft's announcement. It was made Thursday, April 9.
This post misstated the timing of the Washington, D.C., Tesla event. It took place Wednesday evening.
"60 Minutes" made a mistake in using a photograph in its story called "The Internet is Infected." The picture was described in the story as portraying a group of young Russian computer hackers, which was inaccurate. The picture, provided to the CBS television news magazine by an Internet security company, had appeared on a Russian hacker magazine Web site.
This story initially misspelled the McAfee employee's name. It is Dmitry Gryaznov.
This posting originally misstated the Internet youth growth rate and population. Internet usage among youth grew from 73 percent in 2000 to 93 percent in 2006.
This article incorrectly stated the size of the average M&A deal last year. It was $31 million.