The Great Recession cast a shadow on all sectors of the economy in 2009. IT fared better than most, however, and the slump did not curb the dynamic nature of the industry. Acquisitions among big vendors continued to reshape the market, operating-system wars extended to mobile battlefields, microblogging became a powerful source of real-time information, and the take-up of small, 'Net-connected devices was stronger than ever.
PC World's picks for the top 10 stories: Oracle (tries) to buy Sun: The big get bigger; Microsoft launches Windows 7 -- we can all move on now; Chrome OS: Emperor's new clothes or paradigm shift?; Yahoo, Microsoft sign deal ... and seal Yahoo's search fate?; Government 2.0: Obama administration includes tech in stimulus plans; Jobs comes back, again; The microblogging revolution: Twitter helps world follow Iranian protesters; E.U. slaps a fine on Intel, but the antitrust fight is far from over; Droid takes smartphone battle up a notch; and IT forecast: Clearing, with a chance of sun.