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  2. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    22 – Equalizer Circuit Breaker. 23 – Temperature control device, Heater. 24 – Volts per Hertz Relay. 25 – Synchronizing or Synchronism-check Device. 26 – Apparatus Thermal Device, Temperature Switch. 27 – Undervoltage Relay. 27P - Phase Undervoltage. 27S - DC Undervoltage Relay. 27TN - Third Harmonic Neutral Undervoltage.

  3. ATM SafetyPIN software - Wikipedia

    en.wikipedia.org/wiki/ATM_SafetyPIN_software

    ATM SafetyPIN software is a software application that would allow users of automated teller machines (ATMs) to alert law enforcement of a forced cash withdrawal (such as in robbery) by entering their personal identification number (PIN) in reverse order. [1] The system was patented by Illinois lawyer Joseph Zingher ( U.S. patent 5,731,575 ).

  4. Reverse 911 - Wikipedia

    en.wikipedia.org/wiki/Reverse_911

    Reverse 911. Reverse 911 is a public safety communications technology used by public safety organizations in Canada and the United States to communicate with groups of people in a defined geographic area. The system uses a database of telephone numbers and associated addresses, which, when tied into geographic information systems (GIS), can be ...

  5. Reverse divisible number - Wikipedia

    en.wikipedia.org/wiki/Reverse_divisible_number

    Reverse divisible number. In number theory, reversing the digits of a number n sometimes produces another number m that is divisible by n . This happens trivially when n is a palindromic number; the nontrivial reverse divisors are. 1089, 2178, 10989, 21978, 109989, 219978, 1099989, 2199978, ... (sequence A008919 in the OEIS ).

  6. Reverse geocoding - Wikipedia

    en.wikipedia.org/wiki/Reverse_geocoding

    Reverse geocoding is the process of converting a location as described by geographic coordinates (latitude, longitude) to a human-readable address or place name. It is the opposite of forward geocoding (often referred to as address geocoding or simply "geocoding"), hence the term reverse. Reverse geocoding permits the identification of nearby ...

  7. Reverse mathematics - Wikipedia

    en.wikipedia.org/wiki/Reverse_mathematics

    Reverse mathematics. Reverse mathematics is a program in mathematical logic that seeks to determine which axioms are required to prove theorems of mathematics. Its defining method can briefly be described as "going backwards from the theorems to the axioms ", in contrast to the ordinary mathematical practice of deriving theorems from axioms.

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