Discussing the language of science and technology in the Romance languages is highly complex and challenging for several reasons. On the one hand, there are different fields to be included, namely computer sciences, engineering, mathematics, as well as physics and astronomy. On the other hand, English has become (or even has always been in the case of computer sciences) the lingua franca in all these fields, so there seems to be rather little to analyze from a synchronic perspective as far as the Romance languages are concerned, and accordingly there is rather little up-to-date linguistic research on it. In the beginning, that is, during the late 1980s, the focus was on specific phenomena, while modern research often deals with didactic aspects and language teaching. When it comes to the state of research in the different Romance languages, it turns out that it is mainly Canadians who are noted for playing a major role in the analysis of French technolectes. Numerous studies, some of which were conducted by German Romanists, center on the lexis and terminology of specific fields in French. As for Portuguese, most works have been published in Brazil, and lately the focal point seems to have primarily been placed on computer science and mathematics. Studies regarding Italian typically reveal a major interest in the general structure of terminology and its relation to everyday language use. Moreover, special emphasis is often placed on historical matters, especially the role of Galileo. Finally, the influence of specific text types as well as didactic aspects of special languages at different levels of education is also a subject of interest. With regard to Spanish, it should first be pointed out that, due to diatopic variation, it is hardly possible to talk about one single concept of the language of science and technology. Only a few comprehensive works on this area of research exist, yet many individual studies have been published in the last few decades, primarily on information science, especially the influence of English on Spanish, as well as on terminology in different fields. In Catalan, specialized languages emerged rather early, and their development has been systematically encouraged since the 20th century; the center of interest in current research is mainly on information science.