Different between online processing and Real time processing.

Online Processing vs. Real-Time Processing

Online processing and real-time processing are often used interchangeably, but they have distinct characteristics.

Online Processing

• Processing time: Transactions are processed immediately upon input.
• Data storage: Data is typically stored in a database for future reference.
• Examples: Online banking, airline reservations, point-of-sale systems.

Real-Time Processing

• Processing time: Transactions are processed within a strict time constraint, often measured in milliseconds or microseconds.
• Data storage: Data may or may not be stored depending on the application.
• Examples: Industrial control systems, telecommunications, financial trading systems.

Key Differences

Feature	Online Processing	Real-Time Processing
Processing Time	Immediate or near-immediate	Strict time constraints
Data Storage	Typically stores data	May or may not store data
Examples	Online banking, airline reservations	Industrial control systems, telecommunications

In summary, both online and real-time processing involve immediate or near-immediate transaction processing. However, real-time processing imposes stricter time constraints and may not require data storage, making it suitable for applications that require rapid responses to events.