The CICS® Web Interface allows Internet users to run CICS transactions from a Web browser. CICS business transaction services extend CICS support for the Internet.
In a typical current scenario, a Web-based business transaction might be implemented as a pseudoconversational CICS application. The initial request from the browser invokes a CICS transaction that does some setup work, returns a page of HTML to the browser, and ends. Subsequent requests are handled by other CICS transactions (or by further invocations of the same transaction). The CICS application is responsible for maintaining state data between requests.
Using BTS, a Web-based business transaction could be implemented as a BTS process. A major advantage of this approach is that state data is now maintained by BTS. This is particularly useful if the business transaction is long-lived.