What is the full form of ATM.

Hi KunalKangar

welcome to the Apple (user-to-user) Community.

Re: "What is the full form of ATM"

ATM generally means "Automatic Teller Machine".

(Any machine that you insert your bank debit or credit card in, to access your money / account etc)

There can be other uses for ATM ... eg: "Advanced Traffic Management"

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Re: "What is the benefits of communication centre?"

Wondering which communication centre you want to know the benefits of ... for this Apple Community, the main benefit seems to be that many people looking for answers about their Apple products and services find answers from other Apple users who volunteer their time and effort to respond. There is a lot of sharing of experience and knowledge passed on, on many different topics, both technical, and for every-day use.

More info:

How to use Apple Support Communities

Community etiquette guidelines – Apple Support

Optimize your experience in Communities - Apple Support

All the best :-)