The aim of this paper is to investigate the factors involved in applying multimedia in teaching English as a foreign language. In particular, it deals with the non-courseware factors affecting the use of multimedia in improving the pronunciation and oral communications skills of students majoring in English for Specific Purposes at the Jordan University for Science and Technology. The factors under investigation are the following: previous instruction in pronunciation using the conventional classroom teaching method, familiarity with multimedia, English proficiency, academic achievement, free time using multimedia, attitudes toward using multimedia, and socioeconomic class. This study showed that using computers, especially multimedia, as a teaching aid in developing the oral skills of English majors is influenced by several non-courseware factors such as students' academic achievement in English at school, their general grade point average, their achievement in oral courses taught at the university, the extent of their computer use, and their attitude towards it. The results show that there are variations in effect of these factors on using multimedia as a teaching aid in improving the oral skills in a foreign language. (Contains 34 references.) (Author/KFT)