Amazon.com Inc (AMZN.O) said on Thursday it would create more than 100,000 full-time jobs in the United States over the next 18 months.Seattle-based Amazon said it plans to increase its full-time U.S.-based workforce to more than 280,000 by mid-2018 from 180,000 in 2016."These jobs are not just in our Seattle headquarters or in Silicon Valley - they're...