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  2. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...

  3. A new technique can detect newer 4G 'stingray' cell phone ...

    techcrunch.com/2020/08/05/crocodile-hunter-4g...

    Newer cell site simulators, called “Hailstorm” devices, take advantage of similar flaws in 4G that let police snoop on newer phones and devices. Some phone apps claim they can detect stingrays ...

  4. List of Dewey Decimal classes - Wikipedia

    en.wikipedia.org/wiki/List_of_Dewey_Decimal_classes

    List of Dewey Decimal classes. The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. [1] As a system of library classification the DDC is "arranged by ...

  5. Domain Awareness System - Wikipedia

    en.wikipedia.org/wiki/Domain_Awareness_System

    The Domain Awareness System is the largest digital surveillance system in the world [2] as part of the Lower Manhattan Security Initiative in partnership between the New York Police Department and Microsoft to monitor New York City. [3] It allows the NYPD to track surveillance targets and gain detailed information about them, and is overseen by ...

  6. Radio navigation - Wikipedia

    en.wikipedia.org/wiki/Radio_navigation

    Radio navigation or radionavigation is the application of radio frequencies to determine a position of an object on the Earth, either the vessel or an obstruction. [1] [2] Like radiolocation, it is a type of radiodetermination .

  7. Universal Product Code - Wikipedia

    en.wikipedia.org/wiki/Universal_Product_Code

    The Universal Product Code ( UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an ...

  8. List of airline codes - Wikipedia

    en.wikipedia.org/wiki/List_of_airline_codes

    Local distribution system (CRS) and PSS 1J n/a Axess international network, Inc. n/a Japan Local distribution system (CRS) 1K n/a AIRKIOSK n/a Global Local distribution system (CRS) and PSS 1M n/a Sirin n/a Russia Local distribution system (CRS) and PSS 1P n/a Travelport (Worldspan core) n/a Global GDS (CRS) 1S n/a Sabre travel network n/a Global

  9. Wrist-mounted wearable tracks your hand in 3D using thermal ...

    www.engadget.com/fingertrak-wearable-thermal...

    Scientists have developed a wearable that uses thermal imaging and AI to accurate create a 3D model of the hand.

  10. UIC identification marking for tractive stock - Wikipedia

    en.wikipedia.org/wiki/UIC_identification_marking...

    The UIC identification marking for tractive stock is a standard for identifying train stock like locomotives that supply tractive force primarily in Europe. Since the beginning of 2007 locomotives or other traction units in Europe have been given a 12-digit number. Vehicle numbering is now governed by the Intergovernmental Organisation for ...

  11. 1963 United States Tri-Service rocket and guided missile ...

    en.wikipedia.org/wiki/1963_United_States_Tri...

    In 1963, the U.S. Department of Defense established a designation system for rockets and guided missiles jointly used by all the United States armed services. [1] It superseded the separate designation systems the Air Force and Navy had for designating US guided missiles and drones, but also a short-lived interim USAF system for guided missiles ...