SAP has come a long way from ABAP Procedural Programming to Object Oriented ABAP Programming.

ABAP Procedural Programming Drawbacks

• Program Maintenance is complicated
• Difficulty in program management as program size  increases
• No data Hiding
• Very difficult to model real world entity
• Lack of extensibility

The Approach of ABAP Procedural Programming

• Emphasis on tasks
• Large programs are divided into smaller programs known as functions
• Most of the functions share global data
• Data move openly around the system from function to function

The Approach of ABAP Object Oriented Programming

• Emphasis on things that does those tasks
• Programs are divided into objects
• Data structures are designed such that they characterized the objects
• Functions that operate on the data of an object are tied together in the data structure
• Data can be hidden and cannot be accessed by external functions
• New data and functions can be easily added whenever necessary