The logo of Symantec Corp., is displayed at the CeBIT technology fair in Hanover, Germany, on Tuesday, March 6, 2012. Along with Symantec's acquisition of security firm Blue Coat, Apple is unveiling new iOS features at the Worldwide Developer Conference in San Francisco Monday. Video game conference E3 will also occur on Monday in Los Angeles, where Sony will demo its PlayStation 4 virtual reality game console. Here are the top tech stocks to watch, plus a heads up the day's biggest tech conferences: The computer security company will acquire Blue Coat, a network security firm based in Sunnyvale, Calif, for 4.6 billion in cash as announced on Monday. With the deal, Blue Coat CEO Greg Clark will become the new CEO of Symantec and join its board of directors.