No other issue, however, compares in seriousness to that of the deficit in human resources. For the past 30 or 40 years, the United States has substantially depended on the brainpower of people who came here as immigrants--students or faculty, permanently or temporarily. But as other countries continue to build their own bases in science and technology and increase their levels of industrialization, fewer qualified people will come to the United States or stay here. In addition, U.S. companies are sometimes moving operations to foreign countries explicitly to take advantage of the increasing number of highly educated people abroad. The United States could eventually be faced with a reduced science and technology base.