Accuracy: Olden day watches were solely reliant on the skill of the watch maker. Those watches were made up of several hundred parts amongst which many were movable parts. These parts were interlinked using precision tools and highly specialized skills. Each movable part triggered another parts movement and this network of links was required for the eventual functioning of the watch. The accuracy of time display was also directly linked these many movable parts. In fact, the entire mechanism of the watch was called movement (at this term continues to this day). Time accuracy was almost never achieved in those watches and even the available accuracy gradually diminished because of faults in the movement caused by natural wear and tear. Modern day digital watch “movement” contains just a few parts connected through a circuit and this unit guarantees accuracy till the 1000th part of a millisecond. It is possible to synchronize the digital watch to the correct time and not experience a lag or slow down throughout its life time.