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2. Flip clock - Wikipedia

   en.wikipedia.org/wiki/Flip_clock

   Flip clock. A flip clock (also known as a "flap clock") is an electromechanical, digital time keeping device with the time indicated by numbers that are sequentially revealed by a split-flap display. The study, collection and repair of flip clocks is termed horopalettology (from horology – the study and measurement of time and palette – and ...

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. 24-hour clock - Wikipedia

   en.wikipedia.org/wiki/24-hour_clock

   24-hour clock. A public 24-hour clock in Curitiba, Brazil, with the hour hand on the outside and the minute hand on the inside. The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated by the hours (and minutes) passed since midnight, from 00 (:00 ...

5. 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 17 November 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 ...

6. Casio F-91W - Wikipedia

   en.wikipedia.org/wiki/Casio_F-91W

   The watch display shows the day of the week, day of the month, hour, minute, seconds and the signs PM in the afternoon – or 24H (24-hour clock) – at all times, the alarm signal status (bar of vertical lines), and the hourly signal status (double beep on the hour, shown as a bell) are present when activated in the alarm mode.

7. Clock - Wikipedia

   en.wikipedia.org/wiki/Clock

   Analog clocks display time with an analog clock face, which consists of a dial with the numbers 1 through 12 or 24, the hours in the day, around the outside. The hours are indicated with an hour hand , which makes one or two revolutions in a day, while the minutes are indicated by a minute hand , which makes one revolution per hour.