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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. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    Code 1: Respond to the call without emergency lights and sirens. The term "Code 4" is also occasionally considered a response code, though it generally only means "call has been handled or resolved, no further units respond".

  4. Mathematical operators and symbols in Unicode - Wikipedia

    en.wikipedia.org/wiki/Mathematical_operators_and...

    The Supplemental Mathematical Operators block (U+2A00–U+2AFF) contains various mathematical symbols, including N-ary operators, summations and integrals, intersections and unions, logical and relational operators, and subset/superset relations. Supplemental Mathematical Operators [1] Official Unicode Consortium code chart (PDF) 0.

  5. 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.

  6. Torus - Wikipedia

    en.wikipedia.org/wiki/Torus

    A ring torus with aspect ratio 3, the ratio between the diameters of the larger (magenta) circle and the smaller (red) circle. In geometry, a torus ( pl.: tori or toruses) is a surface of revolution generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle.

  7. Operator (That's Not the Way It Feels) - Wikipedia

    en.wikipedia.org/wiki/Operator_(That's_Not_the...

    Operator (That's Not the Way It Feels) " Operator (That's Not the Way It Feels) " is a 1972 song written by Jim Croce. Croce's record was released on August 23, 1972. It was the second single released from Croce's album You Don't Mess Around with Jim. It reached a peak of number 17 on the Billboard Hot 100 in December 1972, spending twelve ...

  8. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 8 uses four 2-digit codes (81, 82, 84, 86) and four sets of 3-digit codes (80x, 85x, 87x, 88x) to serve East Asia, South Asia and special services. 83x and 89x are unallocated. Zone 9 uses seven 2-digit codes (90–95, 98) and three sets of 3-digit codes (96x, 97x, 99x) to serve the Middle East , West Asia , Central Asia , parts of South ...

  9. List of BAC One-Eleven operators - Wikipedia

    en.wikipedia.org/wiki/List_of_BAC_One-Eleven...

    Aeroamerica (U.S. charter carrier which operated former American Airlines aircraft in Europe) Air Illinois. Air Malawi [2] Air Manchester. Air Pacific [3] Air Siam. Air UK. Airways International Cymru. United States / Air Wisconsin.

  10. Increment and decrement operators - Wikipedia

    en.wikipedia.org/wiki/Increment_and_decrement...

    The post-increment operator is commonly used with array subscripts. For example: // Sum the elements of an array float sum_elements(float arr[], int n) { float sum = 0.0; int i = 0; while (i < n) sum += arr[i++]; // Post-increment of i, which steps // through n elements of the array return sum; }

  11. List of BMP-1 operators - Wikipedia

    en.wikipedia.org/wiki/List_of_BMP-1_operators

    The BMP-1 is a Soviet amphibious tracked Infantry fighting vehicle used by many different nations around the world. This is a list of nations that operate it. Afghanistan – 350 BMP-1s ordered in 1979 from Soviet Union and delivered between 1979 and 1990 (some of the vehicles were possibly previously in Soviet service).