Glossaries: P

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Personal Area Network.

Part 90 Bands

Small parts of the RF spectrum that are made available in small areas to businesses for data or voice communications. Many smart grid providers use part 90 licenses for their wireless data.

Passive Sensor

A device that detects and responds to some type of input from the physical environment.


Printed Circuit Board.


Pedestrian Dead Reckoning.


Power Distribution Unit.

Pedestrian Dead Reckoning (PDR)

A method of indoor positioning that uses a last known waypoint, distance, and direction of travel to calculate the current location of a moving person. PDR may be used to supplement other positioning methods such as GPS. Dead reckoning is subject to cumulative errors.

Pen Testing or Pentest

Penetration Testing.

Penetration Testing

A method of evaluating the security of a network or system from internal or external threats. Also called pentests, this is part of a full security audit and typically exploits a combination of weaknesses to gain access and then evaluates the capability of the network’s defenders to detect and respond to the penetration.


Personal Emergency Response System.