Professional Vocabulary in modern english language CONTENT INTRODUCTION………………………………………..............................2 1. Historical Development………….…………………………………………..42. Professional Vocabulary in Different Fields……...……………………….....103. Modern Trends in Professional Vocabulary………………..…………..........174. Learning and Teaching Professional Vocabulary……………………………24 CONCLUSION……………………………………………………………...28REFERENCES………………………………………...…….……………...30