 Between 1979 and 1986, a few were almost immediately upgraded to create new universities, like the University of Trás-os-Montes and Alto Douro, the University of Beira Interior, or the University of the Algarve.Some of those first polytechnics were transformed into University Institutes so that they would not remain "second class" institutions, and a few years later were upgraded to full chartered universities.The polytechnic institutes, heirs of a large network of reputable but discontinued intermediate schools with traditions in technical and vocational education, which also incorporated other older institutions formerly known as industrial institutes (see "Instituto Industrial de Lisboa", "Instituto Superior de Engenharia de Lisboa" and "Instituto Superior de Engenharia do Porto"), were originally created to produce skilled intermediate technicians in specific areas.