Can someone explain what these letters mean please?

Federal ERD. Money will be sent by ACH from RBT to taxpayer's account.

ERD?
ACH?
RBT?

what?!
Update: does RBT have something to do with republican bank transfer? Its the only one I can guess at what it means.
Update 2: ERD=electronic refund deposit?
Update 3: Really? Spam? Thats funny cuz I got it off the Rupublican Bank site
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