Differential psychology: It is a fascinating science that studies the psychological differences between people who are different from each other. as well as the nature, sources and consequences of these differences. A conceptualization of the science of psychology is presented in the following paragraphs. Stern debuted his work on “The Ecology of the World’s Most Influential People. Ideas for differential calculus”. published in 1900. It is important to note that the organization has been studied since ancient times. Philosophers and scientists have realized that all people are different and that all people are different and can be different. V. Stern has succeeded in summarizing all the ideas available in the world (the “Shmuli concept”), which is a concept that has been used in a number of different ways in the past. This is made possible by the prevalence of the experimental methodology in computer science. which includes the measurement of psychometric markers and the subsequent analysis of the data that informs the interpretation of the data. The subject of differential calculus is a study based on the basis of the identification of the differential equations and the analysis of the differential equations through the differential equations.