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  2. Police code - Wikipedia

    en.wikipedia.org/wiki/Police_code

    A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other status ...

  3. List of ISO 639 language codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_639_language_codes

    ISO 639 is a standardized nomenclature used to classify languages. Each language is assigned a two-letter (set 1) and three-letter lowercase abbreviation (sets 2–5). Part 1 of the standard, ISO 639-1 defines the two-letter codes, and Part 3 (2007), ISO 639-3, defines the three-letter codes, aiming to cover all known natural languages, largely superseding the ISO 639-2 three-letter code standard.

  4. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    01869 — Bicester, Oxfordshire – – Was originally 0095 (OX5) until changed to 0869 in 1968. 01870 — Isle of Benbecula, Outer Hebrides, Uist (US0) – – Was originally 0047 (OH) until changed to 0870 in 1968. 01871 — Castlebay, Outer Hebrides – – Was originally 0047 (OH7) until changed to 0871 in 1968.

  5. Postal codes in Germany - Wikipedia

    en.wikipedia.org/wiki/Postal_codes_in_Germany

    Today, German postal codes are numeric and have consisted of five digits since 1993. Between 1990 and 1993 the previous four-digit codes in the former West were prefixed with the letter "W", and in the former East with the letter "O" (for "Ost", "east" in German). Even though the western system had kept some number ranges free, specifically for ...

  6. ISO 3166-1 alpha-2 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1_alpha-2

    ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard [1] published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest. They are the most widely used of the country codes published by ISO (the ...

  7. Electronic color code - Wikipedia

    en.wikipedia.org/wiki/Electronic_color_code

    A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.

  8. ZIP codes in the Philippines - Wikipedia

    en.wikipedia.org/wiki/ZIP_codes_in_the_Philippines

    In the Philippines, a ZIP code is used by the Philippine Postal Corporation (PhlPost) to simplify the distribution of mail. [1] While its function similar with the ZIP Codes used in the United States, its form and usage are quite different. Its use is not mandatory but highly recommended by the PhlPost. A ZIP code is composed of a four-digit ...

  9. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    The fourth Smarandache-Wellin prime is the 355-digit concatenation of the first 128 primes that end with 719. Solinas primes [ edit ] Of the form 2 a ± 2 b ± 1, where 0 < b < a .