This year, Amazon is adding 120,000 temporary workers at its U.S. warehouses for the holiday season, expanding its workforce by about 40 percent. The e-tail giant is also dramatically speeding up its orientation process, The Wall Street Journal reports. While conventional warehouse jobs usually require up to six weeks of training, the company has been using technology such as touchscreens, robots, and scanners to get new hires up to speed in as little as two days.