As part of the academic activities of the Faculty of Engineering- Department of Mechatronics, Manara University organized an academic lecture presented by Professor Mohammad Kher Abdullah Mohammad about the discovery of Euler’s Number, one of the ten most important numbers in mathematics, which led to a huge number of other discoveries and applications in various fields. The discovery of Euler’s Number was a distinctive landmark in solving differential equations, the thing that led to the modelling and analyzing various dynamic systems and phenomena. The speaker also presented a number of applications emulating different phenomena- related to demography, medicine, economics and physics -in which the number plays a vital role in analyzing and controlling.