美国一直以来都是留学生首选的热门留学国家，美国不仅有着杰出的教育资源和教学水平，更是世界上最大的经济体，创造了大多数的就业机会。 据了解，2015财富500强中，美国有176家公司进入世界500强；除此之外，大多数华人移民美国的方式都是通过留学后找到工作，再申请绿卡的方式实现美国移民梦！
美国为了吸引更多的优秀人才留在美国，不断地更新改进移民法，为优秀人才留在美国创造合理全面适用政策的支持。美国现行的移民法中给予留学生最大的支持政策为：即使未拿到工作签证，所有国际留学生，无论什么专业，只要在美国完成任何阶段的大学教育（副学士/本科/硕士/博士），毕业后均可以申请到为期12月的带薪实习，即我们常说的OPT， 有了这个OPT，就可以在美国合法的开展全日制工作。其中，如果你的专业是STEM(科学，技术，工程，数学)4大类专业中的任何一个，你还可以申请17个月的延期，加起来29个月。近日，美国移民局又出新招，有意将OPT延期24个月，而OPT本身也会有12个月，加起来总共为36个月！
这意味着什么呢？
老师介绍：这项提议目前这个提议正在公示阶段，如获得审批通过，即使完全靠OPT，留学生也可以在美国全职工作3年！除此之外，在OPT期间，拿到还可以申请H1-B工作签证，在正式获得H1-B工作签证前，学生仍可以保持OPT身份，而3年的OPT时间无疑可以加大获得工作签证的几率。
老师补充说道：通过这项政策的调整，我们可以看到的是美国对于高新技术人才的渴求程度是非常强烈的，因此，这类专业在美国就业移民的几率也是最大的，因此非常建议我们的广大留学生考虑STEM四大类专业，包含了具体的415个专业，常见的有专业有：
1. 精算
2. 计算机科学 计算机工程
3. 电气工程
4. 信息系统
5. 建筑工程
6. 网络技术
7. 生物医药
8. 食品科学
9. 机械工程
10. 石油工程
为何美国要对STEM专业人才青睐有加？
老师答：据美国劳工部统计，截止到2018年，美国将产生12，000，000个与STEM专业领域相关的工作岗位，而根据预计届时并没有如此多的毕业生能够填补岗位空缺。美国对STEM专业领域的教育领先世界，这也是其在世界范围内保持科技创新的重要砝码，比如当前国际信息产业格局是美国拥有绝对的优势，它在全球的中央处理器、系统软件的产量占有绝大部分的份额，具有影响的全球性网络公司也大多设在美国。这一优势成为美国新经济的一个重要动力，也是美国经济在90年代持续增长的一个重要原因。信息和信息产业已经象核武器、尖端常规武器和经济实力一样，成为美国的重要的战略资源。因此，美国政府在移民法的框架下，多次通过一些具体的法令，特别是增加移民的签证数量，来吸引信息产业方面的高科技人才，效果十分突出。
另附完整的228个专业列表
1. Agroecology and Sustainable Agriculture
2. Animal Sciences
3. Agricultural Animal Breeding
4. Animal Health
5. Animal Nutrition
6. Dairy Science
7. Livestock Management
8. Poultry Science
9. Animal Sciences
10. Food Science
11. Food Technology and Processing
12. Food Science and Technology
13. Plant Sciences
14. Agronomy and Crop Science
15. Horticultural Science
16. Agricultural and Horticultural Plant Breeding
17. Plant Protection and Integrated Pest Management
18. Range Science and Management
19. Plant Sciences
20. Soil Science and Agronomy
21. Soil Chemistry and Physics
22. Soil Microbiology
23. Soil Sciences
24. Natural Resources/Conservation
25. Environmental Studies
26. Environmental Science
27. Natural Resources Conservation and Research
28. Water, Wetlands, and Marine Resources Management
29. Forest Sciences and Biology
30. Urban Forestry
31. Wood Science and Wood Products/Pulp and Paper Technology
32. Wildlife, Fish and Wildlands Science and Management
33. Architectural and Building Sciences/Technology
34. Digital Communication and Media/Multimedia
35. Animation, Interactive Technology, Video Graphics and Special Effects
36. Computer and Information Sciences
37. Artificial Intelligence
38. Information Technology
39. Informatics
40. Computer and Information Sciences
41. Computer Programming/Programmer
42. Computer Programming, Specific Applications
43. Computer Programming, Vendor/Product Certification
44. Computer Programming
45. Data Processing and Data Processing Technology/Technician
46. Information Science/Studies
47. Computer Systems Analysis/Analyst
48. Computer Science
49. Web Page, Digital/Multimedia and Information Resources Design
50. Data Modeling/Warehousing and Database Administration
51. Computer Graphics
52. Modeling, Virtual Environments and Simulation
53. Computer Software and Media Applications
54. Computer Systems Networking and Telecommunications
55. Network and System Administration/Administrator
56. System, Networking, and LAN/WAN Management/Manager
57. Computer and Information Systems Security/Information Assurance
58. Web/Multimedia Management and Webmaster
59. Information Technology Project Management11 111006 Computer Support Specialist
60. Computer/Information Technology Services Administration and Management
61. Educational/Instructional Technology
62. Educational Evaluation and Research
63. Educational Statistics and Research Methods
64. Engineering
65. Pre-Engineering
66. Aerospace, Aeronautical and Astronautical/Space Engineering
67. Agricultural Engineering
68. Architectural Engineering
69. Bioengineering and Biomedical Engineering
70. Ceramic Sciences and Engineering
71. Chemical Engineering
72. Chemical and Biomolecular Engineering
73. Chemical Engineering
74. Civil Engineering
75. Geotechnical and Geoenvironmental Engineering
76. Structural Engineering
77. Transportation and Highway Engineering
78. Water Resources Engineering
79. Civil Engineering
80. Computer Engineering
81. Computer Hardware Engineering
82. Computer Software Engineering
83. Computer Engineering
84. Electrical and Electronics Engineering
85. Laser and Optical Engineering
86. Telecommunications Engineering
87. Electrical, Electronics and Communications Engineering
88. Engineering Mechanics
89. Engineering Physics/Applied Physics
90. Engineering Science14 141401 Environmental/Environmental Health Engineering
91. Materials Engineering
92. Mechanical Engineering
93. Metallurgical Engineering
94. Mining and Mineral Engineering
95. Naval Architecture and Marine Engineering
96. Nuclear Engineering
97. Ocean Engineering
98. Petroleum Engineering
99. Systems Engineering
100. Textile Sciences and Engineering
101. Polymer/Plastics Engineering
102. Construction Engineering
103. Forest Engineering
104. Industrial Engineering
105. Manufacturing Engineering
106. Operations Research
107. Surveying Engineering
108. Geological/Geophysical Engineering
109. Paper Science and Engineering
110. Electromechanical Engineering
111. Mechatronics, Robotics, and Automation Engineering
112. Biochemical Engineering
113. Engineering Chemistry
114. Biological/Biosystems Engineering
115. Engineering
116. Engineering Technology
117. Architectural Engineering Technology/Technician
118. Civil Engineering Technology/Technician
119. Electrical, Electronic and Communications Engineering
120. Laser and Optical Technology/Technician
121. Telecommunications Integrated Circuit Design
122. Electrical and Electronic Engineering Technologies/Technicians
123. Biomedical Technology/Technician
124. Electromechanical Technology/Electromechanical Engineering
125. Instrumentation Technology/Technician
126. Robotics Technology/Technician
127. Automation Engineer Technology/Technician
128. Electromechanical and Instrumentation and Maintenance Technologies/Technicians
129. Heating, Ventilation, Air Conditioning and Refrigeration Engineering
130. Energy Management and Systems Technology/Technician
131. Solar Energy Technology/Technician
132. Water Quality and Wastewater Treatment Management and Recycling
133. Environmental Engineering Technology/Environmental Technology
134. Hazardous Materials Management and Waste Technology/Technician
135. Environmental Control Technologies/Technicians
136. Plastics and Polymer Engineering Technology/Technician
137. Metallurgical Technology/Technician
138. Industrial Technology/Technician
139. Manufacturing Engineering Technology/Technician
140. Welding Engineering Technology/Technician
141. Chemical Engineering Technology/Technician
142. Semiconductor Manufacturing Technology
143. Industrial Production Technologies/Technicians
144. Occupational Safety and Health Technology/Technician
145. Quality Control Technology/Technician
146. Industrial Safety Technology/Technician
147. Hazardous Materials Information Systems Technology/Technician
148. Quality Control and Safety Technologies/Technicians
149. Aeronautical/Aerospace
150. Automotive Engineering Technology/Technician
151. Mechanical Engineering/Mechanical Technology/Technician
152. Mechanical Engineering Related Technologies/Technicians
153. Mining Technology/Technician
154. Petroleum Technology/Technician
155. Mining and Petroleum Technologies/Technicians
156. Construction Engineering Technology/Technician
157. Surveying Technology/Surveying
158. Hydraulics and Fluid Power Technology/Technician
159. Computer Engineering Technology/Technician
160. Computer Technology/Computer Systems Technology
161. Computer Hardware Technology/Technician
162. Computer Software Technology/Technician
163. Computer Engineering Technologies/Technicians
164. Drafting and Design Technology/Technician
165. CAD/CADD Drafting and/or Design Technology/Technician
166. Architectural Drafting and Architectural CAD/CADD
167. Civil Drafting and Civil Engineering CAD/CADD
168. Electrical/Electronics Drafting and Electrical/Electronics CAD/CADD
169. Mechanical Drafting and Mechanical Drafting CAD/CADD
170. Drafting/Design Engineering Technologies/Technicians
171. Nuclear Engineering Technology/Technician
172. Engineering/Industrial Management
173. Engineering Design
174. Packaging Science
175. Engineering-Related Fields
176. Nanotechnology
177. Engineering Technologies and Engineering-Related Fields
178. Biology/Biological Sciences
179. Biomedical Sciences26 260202 Biochemistry
180. Biophysics
181. Molecular Biology
182. Molecular Biochemistry
183. Molecular Biophysics
184. Structural Biology
185. Photobiology
186. Radiation Biology/Radiobiology
187. Biochemistry and Molecular Biology
188. Biochemistry, Biophysics and Molecular Biology
189. Botany/Plant Biology
190. Plant Pathology/Phytopathology
191. Plant Physiology
192. Plant Molecular Biology
193. Botany/Plant Biology
194. Cell/Cellular Biology and Histology
195. Anatomy
196. Developmental Biology and Embryology
197. Cell/Cellular and Molecular Biology
198. Cell Biology and Anatomy
199. Cell/Cellular Biology and Anatomical Sciences
200. Microbiology
201. Medical Microbiology and Bacteriology
202. Virology
203. Parasitology
204. Mycology
205. Immunology
206. Microbiology and Immunology
207. Microbiological Sciences and Immunology
208. Zoology/Animal Biology
209. Entomology
210. Animal Physiology
211. Animal Behavior and Ethology
212. Wildlife Biology
213. Zoology/Animal Biology
214. Genetics
215. Molecular Genetics
216. Microbial and Eukaryotic Genetics
217. Animal Genetics
218. Plant Genetics
219. Human/Medical Genetics
220. Genome Sciences/Genomics
221. Genetics
222. Physiology
223. Molecular Physiology
224. Cell Physiology
225. Endocrinology
226. Reproductive Biology
227. Cardiovascular Science
228. Exercise Physiology
