By Jeffrey Dastin and Emily Stephenson NEW YORK/WASHINGTON (Reuters) – Amazon.com Inc on Thursday said it will create more than 100,000 jobs in the United States, from software development to warehouse work, in its latest move to win over shoppers by investing in faster delivery. The world's largest online retailer will grow its full-time U.S. workforce by more than 50 percent to over 280,000 in the next 18 months, it said in a press release. Amazon is spending heavily on new warehouses so it can stock goods closer to customers and fulfill orders quickly and cheaply.