BlackBerry is tightening its belt, and as a result thousands of people will be out of a job starting at the end of this year. All departments are susceptible to layoffs, which will be done in waves and could cut up to 40 percent of BlackBerry’s workforce. BlackBerry went from cornering 14 percent of the U.S. smartphone market to only 3 percent in just two years, downsizing from 17,000 to 12,700 employees. But even that size staff is unsustainable if BlackBerry wants to compete with the likes of Apple and Samsung. “Organizational moves will continue to occur to ensure we have the right people in the right roles to drive new opportunities in mobile computing,” a BlackBerry spokesman said.