/// ATD Week in Review: New iPhones, Twitter’s IPO and the 64-Bit Question
In case you missed anything, here’s a quick roundup of some of the news that powered AllThingsD this week: On Thursday, Twitter filed for its initial public offering confidentially, under a new “secret” IPO process made possible by the JOBS Act. Just one day before, Facebook CEO Mark Zuckerberg urged the social media rival not to be afraid about going public. But it may not be all good news — Twitter’s actual growth rate seems to be below CEO Dick Costolo’s 2013 projections. At an event on its Cupertino campus on Tuesday, Apple unveiled two new iPhones, the 64-bit iPhone 5s and the cheaper (but not that cheap) 5c . The company’s share price stumbled the next morning , dropping five percent and taking about $20 billion in market value with it.