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English thesaurus
PBX abbr.
abbr.	Private Branch eXchange; Private Branch Exchanges
abbr., avia.	public broadcasting exchange
abbr., chem.ind.	Potassium butyl Xanthate (Alexander Oshis)
abbr., commun.	primary or master or main station; private automatic branch exchange
abbr., food.ind.	Peanut Butter Xtra
abbr., HF.electr.	personal branch exchange
abbr., IT	Private branch exchange
abbr., media.	Punctuation
abbr., mil.	Private Branch Exchange
abbr., mil., avia.	pillbox
abbr., multimed.	private branch telephone exchange
abbr., oil	plastic bonded explosive
abbr., radio	private branch exchange (Alexander Demidov)
abbr., scottish	Polymer Bonded Explosive
abbr., tech.	private branch-exchange
abbr., telecom.	pick-up service
mil.	plastic-bonded explosive
pbx abbr.
abbr.	pillbox

PBX: 49 phrases in 5 subjects

Communications	41
Electronics	4
Information technology	1
Microsoft	1
Telephony	2