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  2. Why is the Facebook icon black? Social media users have ... - AOL

    www.aol.com/why-facebook-icon-black-social...

    Facebook black icon after update On an anecdotal level, the Facebook icon on my iPhone was looking normal this morning. There was an update to the Facebook app available, which I installed (for ...

  3. Headlight flashing - Wikipedia

    en.wikipedia.org/wiki/Headlight_flashing

    Headlight flashing might have come into more common use as a means of attempting driver-to-driver communication by the mid-1970s, [3] when cars began to come with headlight beam selectors located on the steering column—typically activated by pulling the turn signal stalk—rather than the previous foot-operated pushbutton switches.

  4. Variations in traffic light operation - Wikipedia

    en.wikipedia.org/wiki/Variations_in_traffic...

    The left turn signal head operates independently from the signals for straight-through traffic. This allows permissive turning even when straight-through traffic is shown a red light, avoiding yellow trap. Louvers are fitted over the green and yellow balls of the left turn signal head to prevent driver confusion. The left turn signal head is ...

  5. Signal lights - Wikipedia

    en.wikipedia.org/wiki/Signal_lights

    Signal lights may refer to: Traffic light, signal lights controlling automotive & pedestrian traffic flow; Turn signals, signal lights indicating automotive change of direction; Railway signalling, use of signal lights to control train traffic flow; Signal lamp, a device for communicating between ships with flashing lights.

  6. Level crossing signals - Wikipedia

    en.wikipedia.org/wiki/Level_crossing_signals

    The basic signal consists of flashing red lights, a crossbuck and an alarm (either a bell, a speaker that mimics a bell sound or an electronic siren), attached to a mast. At most crossings, the signals will activate about 30 seconds before the train arrives but there are sensors measuring speed so that the crossing knows when to activate; so ...

  7. iOS 11 - Wikipedia

    en.wikipedia.org/wiki/IOS_11

    iOS 11 switches the top-left cellular network strength icons from five dots to four signal bars, similar to that before iOS 7. [ 52 ] A new automatic setup feature called "Quick Start" aims to simplify the first-time setup of new devices, with wireless transfer between the old and new device, transferring preferences, Apple ID and Wi-Fi info ...

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  9. Spotlight (Apple) - Wikipedia

    en.wikipedia.org/wiki/Spotlight_(Apple)

    Within Tiger, Spotlight can be accessed from a number of places. Clicking on an icon in the top-right of the menu bar opens up a text field where a search query can be entered. Finder windows also have a text field in the top-right corner where a query can be entered, as do the standard load and save dialogue boxes. Both of these text fields ...