Glossary

BAM - Business Activity Monitoring: Monitor activity around the enterprise by using clever graphics to present important business metrics to managers and other decision makers.
BEP - Business Event Processing: Just another word used for event processing with emphasis on the business part. (Don’t confuse with Business Event Publisher, a product from IBM)
BPM - Business Process Management: Easy, management of any process within a company. Not trivial to implement though. Never seen a clear definition that everyone can agree on.
CEP - Complex Event Processing: A term made popular by David Luckham.
EAI - Enterprise Application Integration
ECA - Event Condition Action, used on the structure of active rules.
EDA - Event Driven Architecture
EII - Enterprise Information Integration
EOP - Event Oriented Programming
ESB - Enterprise Service Bus
ESP - Event Stream Processing
SOA - Service Oriented Architecture
Event - A notification about a state change in an entity.

An Event Model describes possible event characteristics. For example:

Events occur at an exact point in time. (Some systems have interval characteristics)
Thus, events do not have a duration.
No two events can occur at the exact same time, thus one of the events must come before the other.
Events can not un-occur
The event header can not be changed.
Event body can be changes, but should not.
Events can be transported using any available means, for example a messaging system.

Composite Event - Complex events, derived events, event patterns, composite events and situations are all terms used to describe a combination of multiple events which are somehow related. Events can be related in many different ways. A simple example would be to use the logical operators and or or to combine events into an higher level (composite) event or pattern. Events can also have temporal relationships, for example that they all occur within some specific time period. Events can also be related by causality, for example an Order event causes an Delivery event.