The media (including this article) reported that within two days of the beginning of the new year for temporary H-1B working visas (April 1), 133,000 applications were filed for the 65,000 available slots. These visas are generally designed for computer scientists and engineers. There are other, much smaller, channels for foreign high tech workers to enter the U.S. – for instance through academia. But the immensity of the application volume indicates how much American employers want these foreign workers. These visa applications require sponsorship by American employers. Right now, about half of computer programmers in the U.S. are foreign born.
Immigration reform legislative packages usually include a large increase in the H-1B slots.