What is a transaction processing system? Provide at least one example of a transaction processing system?

There are various forms of management systems, serving different levels of management, transaction processing system is used for operational management. It collects raw data, retrieves and modifies it for data for organizations. Transaction processing system is usually able to handle complex and large transactions, then displays results for end users. These end users can be many and use the system simultaneously. It also reduces error.
The transaction processing system is used to monitor transactions like payroll, order processing et cetra.

                                                    

Reference
Data n.d. (2018) Meriam-Webster Collegiate Online Dictionary, Retrieved from https://www.merriam-webster.com/dictionary/dictionary

Rouse M, (20 ). Strategic business intelligence for a mobile future. Retrieved from http://searchbusinessanalytics.techtarget.com/definition/business-intelligence-BI

Pratt M.K. (2017), Business Intelligence definition and solution 
https://www.cio.com/article/2439504/business-intelligence/business-intelligence-definition-and-solutions.html