Abiot Aysheshim,Yeshareg Getie,2024-04-022024-04-022023-06http://10.194.1.109:8080/xmlui/handle/123456789/845This projects deals about first order ordinary differential equations and their applica tions. It contains three chapters with basic definition and related examples. The first chapter is about introduction of first order ordinary differential equation, the second chapter is about preliminaries of first order ordinary differential equation and the third or the last chapter is about application of first order ordinary differential equation in real world such as:Newton’s law of cooling and population growth and decay. There are many subtopics which are discussed under each chapter.enThesis