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2. Timer - Wikipedia

   en.wikipedia.org/wiki/Timer

   A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.

3. Digital clock - Wikipedia

   en.wikipedia.org/wiki/Digital_clock

   Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).

4. Alarm clock - Wikipedia

   en.wikipedia.org/wiki/Alarm_clock

   This is an accepted version of this page This is the latest accepted revision, reviewed on 27 December 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...

5. 24-hour clock - Wikipedia

   en.wikipedia.org/wiki/24-hour_clock

   24-hour digital clock in Miaoli HSR station. A public 24-hour clock in Curitiba, Brazil, with the hour hand on the outside and the minute hand on the inside.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of ...

6. Electric clock - Wikipedia

   en.wikipedia.org/wiki/Electric_clock

   Synchronized time systems are made up of one master clock and any number of slave clocks. The slave clocks are connected by wires to the master clock. These systems are found in locations where multiple clocks would be used such as learning institutions, businesses, factories, transportation networks, banks, offices and government facilities.

7. 12-hour clock - Wikipedia

   en.wikipedia.org/wiki/12-hour_clock

   Minutes past the hour means those minutes are added to the hour; "ten past five" means 5:10. Minutes to, 'til and of the hour mean those minutes are subtracted; "ten of five", "ten 'til five", and "ten to five" all mean 4:50. Fifteen minutes is often called a quarter hour, and thirty minutes is often known as a half hour. For example, 5:15 can ...

8. Repeater (horology) - Wikipedia

   en.wikipedia.org/wiki/Repeater_(horology)

   The decimal repeater works like the minute repeater, but instead of chiming the quarter hours followed by minutes, it sounds the number of ten-minute intervals after the last hour and then the minutes. For example, if the time is 2:49 then the decimal repeater will sound 2 low tones representing 2 hours, 4 sequence tones representing 40 minutes ...

9. Complication (horology) - Wikipedia

   en.wikipedia.org/wiki/Complication_(horology)

   Three complications on a Gallet MultiChron Navigator (1943): a crown-controlled synchronizable second hand, a direction-finding 24-hour hand, and a 45-minute recording chronograph In horology , a complication is any feature of a timepiece beyond the display of hours, minutes and seconds.