A file containing documents concerning sales of British military equipment to Yugoslavia. The principal subject covered in the file is the Yugoslav effort to obtain electronic warfare equipment, including radar systems, missile control systems, and aircraft electronics. Aspects of this subject discussed include a British refusal to supply these items on security grounds; the highly sophisticated nature of these systems and their possible uses; the superiority of Western technology over the Warsaw Pact in this area; and the possibility of such equipment falling into Warsaw Pact hands in the event of political changes in Yugoslavia. Other subjects discussed in the file include British reluctance to supply the RB199 jet engine to Yugoslavia; Yugoslav demands for increasingly sensitive military information; and the view that the Yugoslav armed forces were experiencing difficulty in obtaining the weapons that they wanted from any source.