Explanation:
Object Oriented Programming (OOPS or OOPS for Object Oriented Programming System) is the most widely used programming paradigm today. While most of the popular programming languages are multi-paradigm, the support to object-oriented programming is fundamental for large projects. Of course OOP has its share of critics. Nowadays functional programming seems the new trendy approach. Still, criticism is due mostly to misuse of OOP.
 
        
             
        
        
        
A browser is an example of a system application
        
             
        
        
        
Answer:
Primary is firsthand, secondary is viewed through articles and other materials.
Explanation:
EX: Primary account of a story, secondary view through pictures.