olemus
tehinguid töötlev andmetöötlussüsteem
= a computerized system that manages all of a company's business transactions

ülevaateid
https://en.wikipedia.org/wiki/Transaction_processing_system
https://nscpolteksby.ac.id/ebook/files/Ebook/Accounting/Accounting%20Information%20System-James%20A.Hall%206%20(2008)/5.%20Chapter%202%20-%20Introduction%20to%20Transaction%20Processing.pdf