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paytrain
payware
PB
Pb
PBA
PBGC
PBJ
PBS
PBX
PC (1)
PC (2)
PCB
PCI
PCMCIA
PCO
PCOS
PCP
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PBX
PBX or P.B.X.


abbr 
Definition:
 
telecommunications private branch exchange
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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