Application Messaging is used by PeopleSoft applications to communicate withone another. This is true not just for 8.1x and 8.4 applications, but also betweenan 8.1x and an 8.4 application. For example, the HRMS 8.3 applications, whichare based on PeopleTools 8.15, can communicate with Financials

8.4applications, which are based on PeopleTools 8.4, using Application Messaging.If specific issues materialize relating to the Application Messages published bycertain applications, these new messages will be made available to customers.