These are the best universities in USA for MS in Computer Science:

Stanford University
MIT
Carnegie Mellon University
University of California, Los Angeles
University of Illinois
University of California, Berkley
Princeton University
Cornell University
Columbia University
University of Massachusetts
University of Minnesota
Virginia Tech University
University of Wisconsin

Here is the list of top 20 Universities in US for doing MS in Computer Science-

1 Carnegie Mellon University
2 Massachusetts Institute of Technology
3 Stanford University
4 University of California-Berkeley
5 Cornell University
6 University of Illinois-Urbana-Champaign
7 University of Washington
8 Princeton University
9 University of Texas-Austin
10 Georgia Institute of Technology
11 California Institute of Technology
12 University of Wisconsin-Madison
13 University of Michigan-Ann Arbor
14 University of California-Los Angeles
15 University of California-San Diego
16 University of Maryland-College Park
17 Columbia University
18 Harvard University
19 University of Pennsylvania
20 Brown University

Here I have listed the top 15 Universities for studying MS in Computer Science-

Stanford University
MIT
Princeton University
Carnegie Mellon University
University of California-Berkeley
Cornell University
University of Illinois at Urban-Champaign
University of North Carolina at Chapel Hill
Harvard University
University of California-Los Angeles
University of California-Santa Barbara
Georgia Institute of Technology
University Of Pennsylvania
University of Texas at Austin
University of Maryland College park

The best Universities in US for MS in Computer Science-

MIT
Carnegie Mellon University
Harvard University
Stanford University
University of California-Berkeley
Cornell University
University of Illinois-Urbana Champaign
Brown University
University of Washington
Princeton University
University of Texas- Austin
Georgia Institute of Technology
California Institute of Technology
University of Pennsylvania
Rice University
University of Maryland- College Park
University of California- San-Diego
University of California-Los Angeles
University of Massachusetts--Amherst