Hi George,
can you please be more specific what you mean?
DB2 on IBM i is supporting so-called multi-event triggers since IBM i 7.1 (see IBM i Technology Updates: Multiple events supported in a single SQL trigger). SAP code is generating these triggers for certain operations, such as upgrades or SLT replication, but you don't need to worry about that. Basically these triggers are programs that are executed whenever a row in a table is inserted, updated or deleted. They can execute whatever SAP or you have coded.
In another context, SAP is talking about events when it comes to submitting background jobs in transaction SM36. When specifying the start condition of a background process, you can specify to start after an event. SAP is shipping a set of pre-defined events (such as SAP_SYSTEM_START), and you can maintain and trigger them through transaction SM64.
Kind regards,
Christian Bartels.