I don't think top MBAs work like that outside India. Generally the MBA is a programme in general management which allows people to either accelerate in their own field internationally or make substantial transitions (especially into finance or consulting). MBAs who previously worked at IBM, HP, Accenture, Oracle, TCS etc are mostly likely to work for those firms, and in IT roles. Otherwise, sales, consulting, operations and programme and project management are easy routes for people to make, but it doesn't always require a formal specialisation. Generally, it's the quality of the school and the passion of the student rather than whether or not there are formal specialisations which best enables MBAs to change direction.

Thank you Duncan for your valuable information

Just to go off of that a bit: often, even if a school doesn't offer a formal specialization in the topic you are interested in, it will offer electives in the area. Even though Stanford doesn't offer specializations, it does have electives in organizational behavior, finance, entrepreneurship, and more.

Also see: http://find-mba.com/board/general-forum/specialisations-dont-often-matter-42969

nice post .Nowadays everyone is looking for good opportunities for their future and wants to join reputed institutions to study abroad.i am also want to complete my mba in usa .