根据搜索结果，暂时无法得知美国总部学校有哪些，但是我可以为您提供福布斯公布的雇主严选美国大学Top20榜单，这些大学被雇主认为毕业生非常受欢迎。以下是部分榜单内容：

雇主严选美国大学Top20

私立大学：

Carnegie Mellon University

Emory University

Georgetown University

Johns Hopkins University

Northwestern University

Rice University

Tufts University

University of Notre Dame

Vanderbilt University

Washington University in St. Louis

公立大学：

Georgia Institute of Technology

Purdue University-West Lafayette

University of Texas at Austin

United States Military Academy

University of Illinois Urbana-Champaign

University of Michigan-Ann Arbor

University of North Carolina at Chapel Hill

University of Pittsburgh