选商科时,他们把business分成了好几种:accounting; managing; marketing..分别指商

选商科时,他们把business分成了好几种:accounting; managing; marketing..分别指商务中的哪些部门啊?学了之后管理什么的?
本人想学managing,可里面有分了好几种Degree的:
Accounting Degrees,Advertising Degrees,Applied Management Degrees,Business Administration Degrees,Business Professional Studies Degrees,Communication Studies Degrees,Construction Management Degrees,E-Commerce & E-Business Degrees,Economics Degrees,Entrepreneurship Degrees,Finance Degrees,Financial Management Degrees,International Business Degrees,Labor Relations Degrees,Leadership Degrees,Management Degrees,Management Accounting Degrees,Manufacturing & Industrial Degrees,Marketing Degrees,Marketing & Sales Degrees,Marketing Management Degrees,Nonprofit Management Degrees,Organizational Leadership Degrees,Organizational Management Degrees,Project Management Degrees,Public Administration Degrees,Public Policy Degrees,Public Relations Degrees,Restaurant & Culinary Degrees,Sports Management Degrees,Supply Chain Management Degrees,Taxation Degrees,Tourism & Hospitality Degrees...有很多,都是商务管理的分类,不知道是什么方面的..