B is the correct answer to ur questions
Answer:
Mainframe Computer System
Explanation:
Mainframe systems or simply mainframes are computers used for critical application, bulk processing and transaction processing.
They are larger than the basic computers we find around. They are advantageous as they are able to process large data faster. For this reason, large institutions like banks tend to use them for processing of data because of the thousands of transactions they engage in.
They are capable of handling and processing very large amount of data quickly.
Examples of other large institutions that uses mainframe computers apart from Bank stated in the question are
1. Stock brokerage firms
2. Government agencies
3. Insurance agencies
4. Fortune 500 companies and so on.
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Programming
It can also be described as Reverse Engineering
