Recently, "design science" has become a popular term in my university department, which is a department of computer science. For example, many current PhD students write in their theses that they are adopting a design science paradigm, typically referring to Herbert Simon's "The Sciences of the Artificial (1970), and Peffers et al. "A Design Science Research Methodology for Information Systems Research" (2007), among others. Why is there a need for using the term "design science" in a computer science department? Isn't computer science in itself enough? Is this a trend among other computer science departments, or is it confined to my own department only?