p.a.

1. An electronic amplification system used as a communication system in public areas (synset 104024549)
   is a type of: communication system - a system for communicating
   has:

   • amplifier - electronic equipment that increases strength of signals passing through it
   • loudspeaker, loudspeaker system, speaker, speaker system, speaker unit - electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
   • tannoy - a loudspeaker
   same as: p.a. system, pa, pa system, public address system

1. By the year;
   Every year (usually with reference to a sum of money paid or received) (synset 400252039)
   "he earned $100,000 per annum"; "we issue six volumes per annum"
   same as: annually, each year, per annum, per year

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