massages (information) - data received by interfaces of Operation Manager, its data analysers and Cases Database Unit of the product.

notifications - the term often is used in the products: Notification Processor, Operation Manager and Report Manager; There are mostly data, that a source are SNMP agents working on network monitored devices.

events - the term often is used in the products: Operation Manager and Report Manager; and it describes a being, that a source is SNMP Trap or SNMP Data; an event is always a part of a case;

cases - the term often is used in the products: Operation Manager and Report Manager; and it describes a group of events connected one another; one event at last must be included in a case;

SNMP Trap - a kind of data of Operation Manager product, which a source are received responses from SNMP agents; SNMP Traps aren't answers on the requests sent by a management station, but they are sent by agents managing network interfaces and processed by Notification Processor product;

SNMP Data - a kind of data of Operation Manager product, which a source are received responses from SNMP agents on request which a management station sent to them by Network Manager.