The precursor to the clock was an Egyptian device that chronicled the passing of the sun on a small stone circle. It represented what we know as time today: The earth rotating in a circle as it circled around the sun, causing the level of sunlight to vary according to the time and place the circle was measuring.
Today, that small stone with the one line denoting the start of the sequence of time has transformed into a more accurate system of satellites that orbit the earth and measure the sun as the earth rotates. These are called global positioning system satellites. They are used today for many purposes, many of which are related to time.
The beginning of what would be called “the atomic clock” started with computers. In computers, time is told by a “stratum.” The stratum involves the sequencing of (more…)