RSB

The abbreviation RSB stands for:

Right bundle branch block, a conduction disturbance in the heart
Regional rapid transit, a former train type the German Federal Railways, see rapid transit # regional rapid transit
Travel agency
Revolutionary Socialist Federal / Fourth International, a Communist Party
Rhenish Schützenbund
Rigi -Scheidegg train
Return receipt letter, a Briefzustellart in Austria
Berlin Radio Symphony Orchestra

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