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This paper gives an overview of the ATLAS Trigger and Data
Acquisition (T/DAQ) system with an emphasis on B-physics capabilities. It
describes recent work on how to maintain the B-physics programme within some
constraints that have arisen: a higher target start-up luminosity, an
incomplete configuration of the detector at start up, and cost constraints for
the T/DAQ system. It also shows how the High Level Trigger (HLT) software has
advanced and gives some results of new performance measurements.
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