Zero in sciences, engineering, its uses in various countries, and opposition faced

In sciences and engineering, zero in connection with a continuous quantity implies only a numerical zero and never an exact zero. Zero related to different science and engineering subjects and also in various often-used technical terms such as tolerance, Telephony, DVD, and Roulette wheels is described. Its use in different countries is presented with a stress on Indian zero and its transmission. The global acceptance of zero was not without opposition/problems. People celebrated the third millennium on January 1, 2000. They celebrated the passing of only 1999 years since, when the calendar was set up, no year 0 was specified. Most people could not grasp why the third millennium and twenty-first century started on January 1, 2001 AD, although one might forgive the original calendar error.