Institutes of technology or polytechnic institutes are technologically focused universities, many dating back to the mid-19th century. A handful of American universities include the phrases Institute of Technology, Polytechnic Institute, Polytechnic University, University of Technology or similar phrasing in their names; these are generally research-intensive universities with a focus on Science, Technology, Engineering and Mathematics (STEM). In the lists below, an asterisk (*) denotes research-intensive universities that offer up to PhD or DSc degrees.