Here’s a look at what the H-1B visa program is and what the Trump administration is doing to it. What are H-1B visas and who uses them? At least 60% of the H-1B visas approved since 2012 have been for computer-related jobs, according to the Pew Research Center. But hospitals, banks, universities and a wide range of other employers can and do apply for H-1B visas. Critics say they undercut American workers, luring people from overseas who are often willing to work for less than American tech workers do.