Barely a year after Microsoft paid $9.5 billion for Nokia's handset unit, the company says it has lost $7.6 billion of that value. That's equal to about 95 percent of what Microsoft paid for the assets, excluding the cash that came with them. Along with a hefty writedown, Microsoft plans to cut as many as 7,800 jobs, many of them related to the purchase of the Finnish mobile phone maker.
Horrifying as this deal may sound in retrospect, it's neither the biggest writedown for Microsoft by size nor its largest destruction of value. We've put together a list breaking down four of the most costly charges in the company's history.