For MBA, you may not be eligible for well ranked universities. However for Computer Science, some good universities can accept you. Some best universities may also ask you to take GRE test for admission in Computer Science program. However, there are some universities which will accept you without GRE.

These universities may be best for you:

George Washington University
http://www.cs.gwu.edu/

Oklahoma City University
http://www.okcu.edu/petree/compsci/csnew/index.php?type=gradgentrack

North Dakota State University
http://cs.ndsu.nodak.edu/

Nova Southeastern University
http://scis.nova.edu/

The process and requirements for admission may be different for different universities. I suggest you to visit the links I have mentioned below the names of university to learn more about admission requirements and procedure.

Hi jyoti, as far I know, US universities don’t accept IELTS; at least reputed ones don’t accept and for MS you need to give GRE (math=800 marks, English=800 marks, i.e. 1600 total) and TOEFL (English=120). For entering into US, you have to score at least 800/1600. You’ll get some ordinary universities with this score. For getting into some good universities, you have to score 1200+ in GRE and 80+ in TOEFL IBT.