INTRODUCTION 3
1. THEORETICAL BACKGROUND 5
1.1 The English vocabulary as a system 5
1.2 Stylistic classification of English vocabulary 10
1.3 General notion about terminological systems 13
2. USE OF SPECIAL TERMINOLOGY IN DIFFERENT PROFFESSIONAL SPHERES 18
2.1Peculiarities of scientific and technical terminology 18
2.2 The role of terminology in official documents (economic, legal and etc.) 21
2.3 Use of medical terms 27
CONCLUSION 32
REFERENCES 35