This is a presentation from video on 'Introduction to Operations Research' available at the end of this presentations and directly at https://youtu.be/PSOW3_gX2OU Topics like Organisations of Operations Research, History of Operations Research Role of Operations Research(OR), Scope of Operations Research(OR), Characteristics of Operations Research(OR), Attributes of Operations Research(OR). This video also talks about Models of Operations Research • Degree of abstraction o Mathematical models o Language models o Concrete models • Function o Descriptive models o Predictive models o Normative models • Time Horizon o Static models o Dynamic models • Structure o Iconic or physical models o Analog or schematic models o Symbolic or mathematical models • Nature of environment o Deterministic models o Probabilistic models • Extent of generality o General model o Specific models