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2013 was a great year for social media but a somewhat forgettable one for online security, with a series of high-profile software glitches and exploits causing a lot of damage, both in reputations and finances, throughout the year.

Consider Twitter, for example. A hacked Associated Press (@AP) tweet that reported an explosion in the White House and an injured President Obama triggered an immediate collapse in the stock market costing hundreds of millions of dollars.

Sure, the exploit was quickly rectified and calm resorted, but the event shined a light on the sheer power of Twitter to move markets on news, even if it was falsified. Target, Amazon, NASDAQ and others also had major technical snafus in 2013, and this visual from Cast Software takes a closer look at last year’s biggest software disasters....