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The Antikythera mechanism (/ ˌæntɪkɪˈθɪərə / AN-tik-ih-THEER-ə, US also / ˌæntaɪkɪˈ -/ AN-ty-kih-) [1][2] is an Ancient Greek hand-powered orrery (model of the Solar System). It is the oldest known example of an analogue computer [3][4][5] used to predict astronomical positions and eclipses decades in advance. [6][7][8] It could ...
In 1979, Kronos delivered the world's first microprocessor-based time clock and, in 1985, delivered its first PC-based time and attendance product. In 1992, Kronos became a publicly-traded company on NASDAQ. Aron Ain, [6] succeeded his brother Mark Ain as chief executive officer in 2005. [7] In March 2007, Kronos went private again, bought out ...
Time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card, into a slot on the time clock.
The time clock division of Simplex was sold to Kronos shortly afterward. On September 6, 2016, Johnson Controls and Tyco completed a merger. [ 2 ] In May 2017, Johnson Controls announced that the brand identity of SimplexGrinnell will be transitioned to Johnson Controls.
Defining holdover. In Synchronization in telecommunications applications holdover is defined by ETSI as: An operating condition of a clock which has lost its controlling input and is using stored data, acquired while in locked operation, to control its output. The stored data are used to control phase and frequency variations, allowing the ...
A museum exhibit of Calculagraphs. The Calculagraph is a device which mechanically calculates and prints the elapsed time between two events. Their best known, earliest use was as a means of tracking of table usage in pool halls. Later, until the advent of the digital era, they became the standard way to clock the duration of toll telephone calls.
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