In Brief

Here’s what you can say on Facebook without being fired.

The Trayvon Martin murder trial is pushing the limits of social media in the legal system, and how the courts address the case will an impact beyond the Miami courtroom.

Nokia this week unveiled the Lumia 920 and 820, its first Windows 8 devices, setting the stage for a showdown against iPhone and Android in a one-two punch to cleave market share.