OOP is Nothing but Object Oriented Programming.
In OOPs concept is implimented in our real life systems.
OOPs have following features
1. Object   - Instance of class
2. Class    - Blue print of Object 
3. encapsulation  - Protecting our data
4. polymorphism   - Different behaviors at diff. instances
5. abstraction    - Hidding our irrelavance data
6. inheritence    - one property of object is aquring to 
another property of object
 
Simple Ex.

Please assume u standing near a car. How to impliments our 
OOPs concept for this scenario ?

Simple,
car is a object b'coz it having more functions.
car is a class b'coz it contain more parts and features 
inside.
car is a Encapsulation B'coz it protected some unwanted 
parts or functions to user
car is a Polymorphism b'coz it have different speed as 
display in same speedometer
car is a Abstraction b'coz it hidding more parts by coverig 
such as engine,disel tank
car is a Inheritance b'coz one car is a property of more 
people. i mean your car is driving bu you, your friend and 
your relatives.