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  2. Orders of magnitude (time) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(time)

    Orders of magnitude (time) An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years. In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year". In other cases, the quantity name implies the base unit ...

  3. List of tz database time zones - Wikipedia

    en.wikipedia.org/wiki/List_of_tz_database_time_zones

    Time Zone abbreviations. Time zone abbreviations for both Standard Time and Daylight Saving Time are shown exactly as they appear in the database. See strftime and its "%Z" field. Some of zone records use 3 or 4 letter abbreviations that are tied to physical time zones, others use numeric UTC offsets. List

  4. Railway signals in Germany - Wikipedia

    en.wikipedia.org/wiki/Railway_signals_in_Germany

    (Note: the systems Sk and Sv are not covered by this article yet.) Most instances of the additional signal types (like Zs, Ne) can be combined with all the signal systems, e.g.: Zs 3(v) (speed limitation) appears with H/V and Ks, but Hl uses its own speed display; Zs 1 and Zs 8 appear with all of them, but in different shape.

  5. Temporal database - Wikipedia

    en.wikipedia.org/wiki/Temporal_database

    For the example above, to record valid time, the person table has two fields added, valid_from and valid_to. These specify the period when a person's address is valid in the real world. On 1975-04-04, John's father registered his son's birth. An official then inserts a new entry into the database stating that John lives in Smallville from April 3.

  6. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    t. e. ISO 8601 is an international standard covering the worldwide exchange and communication of date and time -related data. It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]

  7. Faster-than-light - Wikipedia

    en.wikipedia.org/wiki/Faster-than-light

    Some processes propagate faster than c, but cannot carry information (see examples in the sections immediately following). In some materials where light travels at speed c/n (where n is the refractive index) other particles can travel faster than c/n (but still slower than c), leading to Cherenkov radiation (see phase velocity below).

  8. tz database - Wikipedia

    en.wikipedia.org/wiki/Tz_database

    For example, the CLDR Windows–Tzid table maps Microsoft Windows time zone IDs to the standard Olson names, although such a mapping cannot be perfect because the number of time zones in Windows systems is significantly lower than in the IANA TZ database. History. The project's origins go back to 1986 or earlier. 2011 lawsuit

  9. ß - Wikipedia

    en.wikipedia.org/wiki/ß

    In German orthography, the letter ß, called Eszett ( IPA: [ɛsˈtsɛt]) or scharfes S ( IPA: [ˌʃaʁfəs ˈʔɛs], "sharp S"), represents the / s / phoneme in Standard German when following long vowels and diphthongs. The letter-name Eszett combines the names of the letters of s ( Es) and z ( Zett) in German.